Commit | Line | Data |
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176eb98c MS |
1 | /* GNU/Linux/AArch64 specific low level interface, for the remote server for |
2 | GDB. | |
3 | ||
b811d2c2 | 4 | Copyright (C) 2009-2020 Free Software Foundation, Inc. |
176eb98c MS |
5 | Contributed by ARM Ltd. |
6 | ||
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
11 | the Free Software Foundation; either version 3 of the License, or | |
12 | (at your option) any later version. | |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
21 | ||
22 | #include "server.h" | |
23 | #include "linux-low.h" | |
db3cb7cb | 24 | #include "nat/aarch64-linux.h" |
554717a3 | 25 | #include "nat/aarch64-linux-hw-point.h" |
bb903df0 | 26 | #include "arch/aarch64-insn.h" |
3b53ae99 | 27 | #include "linux-aarch32-low.h" |
176eb98c | 28 | #include "elf/common.h" |
afbe19f8 PL |
29 | #include "ax.h" |
30 | #include "tracepoint.h" | |
f9d949fb | 31 | #include "debug.h" |
176eb98c MS |
32 | |
33 | #include <signal.h> | |
34 | #include <sys/user.h> | |
5826e159 | 35 | #include "nat/gdb_ptrace.h" |
e9dae05e | 36 | #include <asm/ptrace.h> |
bb903df0 PL |
37 | #include <inttypes.h> |
38 | #include <endian.h> | |
39 | #include <sys/uio.h> | |
176eb98c MS |
40 | |
41 | #include "gdb_proc_service.h" | |
cc628f3d | 42 | #include "arch/aarch64.h" |
7cc17433 | 43 | #include "linux-aarch32-tdesc.h" |
d6d7ce56 | 44 | #include "linux-aarch64-tdesc.h" |
fefa175e | 45 | #include "nat/aarch64-sve-linux-ptrace.h" |
02895270 | 46 | #include "tdesc.h" |
176eb98c | 47 | |
176eb98c MS |
48 | #ifdef HAVE_SYS_REG_H |
49 | #include <sys/reg.h> | |
50 | #endif | |
51 | ||
ef0478f6 TBA |
52 | /* Linux target op definitions for the AArch64 architecture. */ |
53 | ||
54 | class aarch64_target : public linux_process_target | |
55 | { | |
56 | public: | |
57 | ||
aa8d21c9 TBA |
58 | const regs_info *get_regs_info () override; |
59 | ||
06250e4e TBA |
60 | int breakpoint_kind_from_pc (CORE_ADDR *pcptr) override; |
61 | ||
62 | int breakpoint_kind_from_current_state (CORE_ADDR *pcptr) override; | |
63 | ||
3ca4edb6 TBA |
64 | const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override; |
65 | ||
007c9b97 TBA |
66 | bool supports_z_point_type (char z_type) override; |
67 | ||
47f70aa7 TBA |
68 | bool supports_tracepoints () override; |
69 | ||
809a0c35 TBA |
70 | bool supports_fast_tracepoints () override; |
71 | ||
72 | int install_fast_tracepoint_jump_pad | |
73 | (CORE_ADDR tpoint, CORE_ADDR tpaddr, CORE_ADDR collector, | |
74 | CORE_ADDR lockaddr, ULONGEST orig_size, CORE_ADDR *jump_entry, | |
75 | CORE_ADDR *trampoline, ULONGEST *trampoline_size, | |
76 | unsigned char *jjump_pad_insn, ULONGEST *jjump_pad_insn_size, | |
77 | CORE_ADDR *adjusted_insn_addr, CORE_ADDR *adjusted_insn_addr_end, | |
78 | char *err) override; | |
79 | ||
80 | int get_min_fast_tracepoint_insn_len () override; | |
81 | ||
ab64c999 TBA |
82 | struct emit_ops *emit_ops () override; |
83 | ||
797bcff5 TBA |
84 | protected: |
85 | ||
86 | void low_arch_setup () override; | |
daca57a7 TBA |
87 | |
88 | bool low_cannot_fetch_register (int regno) override; | |
89 | ||
90 | bool low_cannot_store_register (int regno) override; | |
bf9ae9d8 TBA |
91 | |
92 | bool low_supports_breakpoints () override; | |
93 | ||
94 | CORE_ADDR low_get_pc (regcache *regcache) override; | |
95 | ||
96 | void low_set_pc (regcache *regcache, CORE_ADDR newpc) override; | |
d7146cda TBA |
97 | |
98 | bool low_breakpoint_at (CORE_ADDR pc) override; | |
9db9aa23 TBA |
99 | |
100 | int low_insert_point (raw_bkpt_type type, CORE_ADDR addr, | |
101 | int size, raw_breakpoint *bp) override; | |
102 | ||
103 | int low_remove_point (raw_bkpt_type type, CORE_ADDR addr, | |
104 | int size, raw_breakpoint *bp) override; | |
ac1bbaca TBA |
105 | |
106 | bool low_stopped_by_watchpoint () override; | |
107 | ||
108 | CORE_ADDR low_stopped_data_address () override; | |
cb63de7c TBA |
109 | |
110 | bool low_siginfo_fixup (siginfo_t *native, gdb_byte *inf, | |
111 | int direction) override; | |
fd000fb3 TBA |
112 | |
113 | arch_process_info *low_new_process () override; | |
114 | ||
115 | void low_delete_process (arch_process_info *info) override; | |
116 | ||
117 | void low_new_thread (lwp_info *) override; | |
118 | ||
119 | void low_delete_thread (arch_lwp_info *) override; | |
120 | ||
121 | void low_new_fork (process_info *parent, process_info *child) override; | |
d7599cc0 TBA |
122 | |
123 | void low_prepare_to_resume (lwp_info *lwp) override; | |
13e567af TBA |
124 | |
125 | int low_get_thread_area (int lwpid, CORE_ADDR *addrp) override; | |
9cfd8715 TBA |
126 | |
127 | bool low_supports_range_stepping () override; | |
ef0478f6 TBA |
128 | }; |
129 | ||
130 | /* The singleton target ops object. */ | |
131 | ||
132 | static aarch64_target the_aarch64_target; | |
133 | ||
daca57a7 TBA |
134 | bool |
135 | aarch64_target::low_cannot_fetch_register (int regno) | |
136 | { | |
137 | gdb_assert_not_reached ("linux target op low_cannot_fetch_register " | |
138 | "is not implemented by the target"); | |
139 | } | |
140 | ||
141 | bool | |
142 | aarch64_target::low_cannot_store_register (int regno) | |
143 | { | |
144 | gdb_assert_not_reached ("linux target op low_cannot_store_register " | |
145 | "is not implemented by the target"); | |
146 | } | |
147 | ||
d7599cc0 TBA |
148 | void |
149 | aarch64_target::low_prepare_to_resume (lwp_info *lwp) | |
150 | { | |
151 | aarch64_linux_prepare_to_resume (lwp); | |
152 | } | |
153 | ||
176eb98c MS |
154 | /* Per-process arch-specific data we want to keep. */ |
155 | ||
156 | struct arch_process_info | |
157 | { | |
158 | /* Hardware breakpoint/watchpoint data. | |
159 | The reason for them to be per-process rather than per-thread is | |
160 | due to the lack of information in the gdbserver environment; | |
161 | gdbserver is not told that whether a requested hardware | |
162 | breakpoint/watchpoint is thread specific or not, so it has to set | |
163 | each hw bp/wp for every thread in the current process. The | |
164 | higher level bp/wp management in gdb will resume a thread if a hw | |
165 | bp/wp trap is not expected for it. Since the hw bp/wp setting is | |
166 | same for each thread, it is reasonable for the data to live here. | |
167 | */ | |
168 | struct aarch64_debug_reg_state debug_reg_state; | |
169 | }; | |
170 | ||
3b53ae99 YQ |
171 | /* Return true if the size of register 0 is 8 byte. */ |
172 | ||
173 | static int | |
174 | is_64bit_tdesc (void) | |
175 | { | |
176 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
177 | ||
178 | return register_size (regcache->tdesc, 0) == 8; | |
179 | } | |
180 | ||
02895270 AH |
181 | /* Return true if the regcache contains the number of SVE registers. */ |
182 | ||
183 | static bool | |
184 | is_sve_tdesc (void) | |
185 | { | |
186 | struct regcache *regcache = get_thread_regcache (current_thread, 0); | |
187 | ||
6cdd651f | 188 | return tdesc_contains_feature (regcache->tdesc, "org.gnu.gdb.aarch64.sve"); |
02895270 AH |
189 | } |
190 | ||
176eb98c MS |
191 | static void |
192 | aarch64_fill_gregset (struct regcache *regcache, void *buf) | |
193 | { | |
6a69a054 | 194 | struct user_pt_regs *regset = (struct user_pt_regs *) buf; |
176eb98c MS |
195 | int i; |
196 | ||
197 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
cc628f3d AH |
198 | collect_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]); |
199 | collect_register (regcache, AARCH64_SP_REGNUM, ®set->sp); | |
200 | collect_register (regcache, AARCH64_PC_REGNUM, ®set->pc); | |
201 | collect_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate); | |
176eb98c MS |
202 | } |
203 | ||
204 | static void | |
205 | aarch64_store_gregset (struct regcache *regcache, const void *buf) | |
206 | { | |
6a69a054 | 207 | const struct user_pt_regs *regset = (const struct user_pt_regs *) buf; |
176eb98c MS |
208 | int i; |
209 | ||
210 | for (i = 0; i < AARCH64_X_REGS_NUM; i++) | |
cc628f3d AH |
211 | supply_register (regcache, AARCH64_X0_REGNUM + i, ®set->regs[i]); |
212 | supply_register (regcache, AARCH64_SP_REGNUM, ®set->sp); | |
213 | supply_register (regcache, AARCH64_PC_REGNUM, ®set->pc); | |
214 | supply_register (regcache, AARCH64_CPSR_REGNUM, ®set->pstate); | |
176eb98c MS |
215 | } |
216 | ||
217 | static void | |
218 | aarch64_fill_fpregset (struct regcache *regcache, void *buf) | |
219 | { | |
9caa3311 | 220 | struct user_fpsimd_state *regset = (struct user_fpsimd_state *) buf; |
176eb98c MS |
221 | int i; |
222 | ||
223 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
cc628f3d AH |
224 | collect_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]); |
225 | collect_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr); | |
226 | collect_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr); | |
176eb98c MS |
227 | } |
228 | ||
229 | static void | |
230 | aarch64_store_fpregset (struct regcache *regcache, const void *buf) | |
231 | { | |
9caa3311 YQ |
232 | const struct user_fpsimd_state *regset |
233 | = (const struct user_fpsimd_state *) buf; | |
176eb98c MS |
234 | int i; |
235 | ||
236 | for (i = 0; i < AARCH64_V_REGS_NUM; i++) | |
cc628f3d AH |
237 | supply_register (regcache, AARCH64_V0_REGNUM + i, ®set->vregs[i]); |
238 | supply_register (regcache, AARCH64_FPSR_REGNUM, ®set->fpsr); | |
239 | supply_register (regcache, AARCH64_FPCR_REGNUM, ®set->fpcr); | |
176eb98c MS |
240 | } |
241 | ||
1ef53e6b AH |
242 | /* Store the pauth registers to regcache. */ |
243 | ||
244 | static void | |
245 | aarch64_store_pauthregset (struct regcache *regcache, const void *buf) | |
246 | { | |
247 | uint64_t *pauth_regset = (uint64_t *) buf; | |
248 | int pauth_base = find_regno (regcache->tdesc, "pauth_dmask"); | |
249 | ||
250 | if (pauth_base == 0) | |
251 | return; | |
252 | ||
253 | supply_register (regcache, AARCH64_PAUTH_DMASK_REGNUM (pauth_base), | |
254 | &pauth_regset[0]); | |
255 | supply_register (regcache, AARCH64_PAUTH_CMASK_REGNUM (pauth_base), | |
256 | &pauth_regset[1]); | |
257 | } | |
258 | ||
bf9ae9d8 TBA |
259 | bool |
260 | aarch64_target::low_supports_breakpoints () | |
261 | { | |
262 | return true; | |
263 | } | |
264 | ||
265 | /* Implementation of linux target ops method "low_get_pc". */ | |
421530db | 266 | |
bf9ae9d8 TBA |
267 | CORE_ADDR |
268 | aarch64_target::low_get_pc (regcache *regcache) | |
176eb98c | 269 | { |
8a7e4587 | 270 | if (register_size (regcache->tdesc, 0) == 8) |
a5652c21 | 271 | return linux_get_pc_64bit (regcache); |
8a7e4587 | 272 | else |
a5652c21 | 273 | return linux_get_pc_32bit (regcache); |
176eb98c MS |
274 | } |
275 | ||
bf9ae9d8 | 276 | /* Implementation of linux target ops method "low_set_pc". */ |
421530db | 277 | |
bf9ae9d8 TBA |
278 | void |
279 | aarch64_target::low_set_pc (regcache *regcache, CORE_ADDR pc) | |
176eb98c | 280 | { |
8a7e4587 | 281 | if (register_size (regcache->tdesc, 0) == 8) |
a5652c21 | 282 | linux_set_pc_64bit (regcache, pc); |
8a7e4587 | 283 | else |
a5652c21 | 284 | linux_set_pc_32bit (regcache, pc); |
176eb98c MS |
285 | } |
286 | ||
176eb98c MS |
287 | #define aarch64_breakpoint_len 4 |
288 | ||
37d66942 PL |
289 | /* AArch64 BRK software debug mode instruction. |
290 | This instruction needs to match gdb/aarch64-tdep.c | |
291 | (aarch64_default_breakpoint). */ | |
292 | static const gdb_byte aarch64_breakpoint[] = {0x00, 0x00, 0x20, 0xd4}; | |
176eb98c | 293 | |
d7146cda | 294 | /* Implementation of linux target ops method "low_breakpoint_at". */ |
421530db | 295 | |
d7146cda TBA |
296 | bool |
297 | aarch64_target::low_breakpoint_at (CORE_ADDR where) | |
176eb98c | 298 | { |
db91f502 YQ |
299 | if (is_64bit_tdesc ()) |
300 | { | |
301 | gdb_byte insn[aarch64_breakpoint_len]; | |
176eb98c | 302 | |
d7146cda | 303 | read_memory (where, (unsigned char *) &insn, aarch64_breakpoint_len); |
db91f502 | 304 | if (memcmp (insn, aarch64_breakpoint, aarch64_breakpoint_len) == 0) |
d7146cda | 305 | return true; |
176eb98c | 306 | |
d7146cda | 307 | return false; |
db91f502 YQ |
308 | } |
309 | else | |
310 | return arm_breakpoint_at (where); | |
176eb98c MS |
311 | } |
312 | ||
176eb98c MS |
313 | static void |
314 | aarch64_init_debug_reg_state (struct aarch64_debug_reg_state *state) | |
315 | { | |
316 | int i; | |
317 | ||
318 | for (i = 0; i < AARCH64_HBP_MAX_NUM; ++i) | |
319 | { | |
320 | state->dr_addr_bp[i] = 0; | |
321 | state->dr_ctrl_bp[i] = 0; | |
322 | state->dr_ref_count_bp[i] = 0; | |
323 | } | |
324 | ||
325 | for (i = 0; i < AARCH64_HWP_MAX_NUM; ++i) | |
326 | { | |
327 | state->dr_addr_wp[i] = 0; | |
328 | state->dr_ctrl_wp[i] = 0; | |
329 | state->dr_ref_count_wp[i] = 0; | |
330 | } | |
331 | } | |
332 | ||
176eb98c MS |
333 | /* Return the pointer to the debug register state structure in the |
334 | current process' arch-specific data area. */ | |
335 | ||
db3cb7cb | 336 | struct aarch64_debug_reg_state * |
88e2cf7e | 337 | aarch64_get_debug_reg_state (pid_t pid) |
176eb98c | 338 | { |
88e2cf7e | 339 | struct process_info *proc = find_process_pid (pid); |
176eb98c | 340 | |
fe978cb0 | 341 | return &proc->priv->arch_private->debug_reg_state; |
176eb98c MS |
342 | } |
343 | ||
007c9b97 | 344 | /* Implementation of target ops method "supports_z_point_type". */ |
421530db | 345 | |
007c9b97 TBA |
346 | bool |
347 | aarch64_target::supports_z_point_type (char z_type) | |
4ff0d3d8 PA |
348 | { |
349 | switch (z_type) | |
350 | { | |
96c97461 | 351 | case Z_PACKET_SW_BP: |
4ff0d3d8 PA |
352 | case Z_PACKET_HW_BP: |
353 | case Z_PACKET_WRITE_WP: | |
354 | case Z_PACKET_READ_WP: | |
355 | case Z_PACKET_ACCESS_WP: | |
007c9b97 | 356 | return true; |
4ff0d3d8 | 357 | default: |
007c9b97 | 358 | return false; |
4ff0d3d8 PA |
359 | } |
360 | } | |
361 | ||
9db9aa23 | 362 | /* Implementation of linux target ops method "low_insert_point". |
176eb98c | 363 | |
421530db PL |
364 | It actually only records the info of the to-be-inserted bp/wp; |
365 | the actual insertion will happen when threads are resumed. */ | |
176eb98c | 366 | |
9db9aa23 TBA |
367 | int |
368 | aarch64_target::low_insert_point (raw_bkpt_type type, CORE_ADDR addr, | |
369 | int len, raw_breakpoint *bp) | |
176eb98c MS |
370 | { |
371 | int ret; | |
4ff0d3d8 | 372 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
373 | struct aarch64_debug_reg_state *state |
374 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 375 | |
c5e92cca | 376 | if (show_debug_regs) |
176eb98c MS |
377 | fprintf (stderr, "insert_point on entry (addr=0x%08lx, len=%d)\n", |
378 | (unsigned long) addr, len); | |
379 | ||
802e8e6d PA |
380 | /* Determine the type from the raw breakpoint type. */ |
381 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
382 | |
383 | if (targ_type != hw_execute) | |
39edd165 YQ |
384 | { |
385 | if (aarch64_linux_region_ok_for_watchpoint (addr, len)) | |
386 | ret = aarch64_handle_watchpoint (targ_type, addr, len, | |
387 | 1 /* is_insert */, state); | |
388 | else | |
389 | ret = -1; | |
390 | } | |
176eb98c | 391 | else |
8d689ee5 YQ |
392 | { |
393 | if (len == 3) | |
394 | { | |
395 | /* LEN is 3 means the breakpoint is set on a 32-bit thumb | |
396 | instruction. Set it to 2 to correctly encode length bit | |
397 | mask in hardware/watchpoint control register. */ | |
398 | len = 2; | |
399 | } | |
400 | ret = aarch64_handle_breakpoint (targ_type, addr, len, | |
401 | 1 /* is_insert */, state); | |
402 | } | |
176eb98c | 403 | |
60a191ed | 404 | if (show_debug_regs) |
88e2cf7e YQ |
405 | aarch64_show_debug_reg_state (state, "insert_point", addr, len, |
406 | targ_type); | |
176eb98c MS |
407 | |
408 | return ret; | |
409 | } | |
410 | ||
9db9aa23 | 411 | /* Implementation of linux target ops method "low_remove_point". |
176eb98c | 412 | |
421530db PL |
413 | It actually only records the info of the to-be-removed bp/wp, |
414 | the actual removal will be done when threads are resumed. */ | |
176eb98c | 415 | |
9db9aa23 TBA |
416 | int |
417 | aarch64_target::low_remove_point (raw_bkpt_type type, CORE_ADDR addr, | |
418 | int len, raw_breakpoint *bp) | |
176eb98c MS |
419 | { |
420 | int ret; | |
4ff0d3d8 | 421 | enum target_hw_bp_type targ_type; |
88e2cf7e YQ |
422 | struct aarch64_debug_reg_state *state |
423 | = aarch64_get_debug_reg_state (pid_of (current_thread)); | |
4ff0d3d8 | 424 | |
c5e92cca | 425 | if (show_debug_regs) |
176eb98c MS |
426 | fprintf (stderr, "remove_point on entry (addr=0x%08lx, len=%d)\n", |
427 | (unsigned long) addr, len); | |
428 | ||
802e8e6d PA |
429 | /* Determine the type from the raw breakpoint type. */ |
430 | targ_type = raw_bkpt_type_to_target_hw_bp_type (type); | |
176eb98c MS |
431 | |
432 | /* Set up state pointers. */ | |
433 | if (targ_type != hw_execute) | |
434 | ret = | |
c67ca4de YQ |
435 | aarch64_handle_watchpoint (targ_type, addr, len, 0 /* is_insert */, |
436 | state); | |
176eb98c | 437 | else |
8d689ee5 YQ |
438 | { |
439 | if (len == 3) | |
440 | { | |
441 | /* LEN is 3 means the breakpoint is set on a 32-bit thumb | |
442 | instruction. Set it to 2 to correctly encode length bit | |
443 | mask in hardware/watchpoint control register. */ | |
444 | len = 2; | |
445 | } | |
446 | ret = aarch64_handle_breakpoint (targ_type, addr, len, | |
447 | 0 /* is_insert */, state); | |
448 | } | |
176eb98c | 449 | |
60a191ed | 450 | if (show_debug_regs) |
88e2cf7e YQ |
451 | aarch64_show_debug_reg_state (state, "remove_point", addr, len, |
452 | targ_type); | |
176eb98c MS |
453 | |
454 | return ret; | |
455 | } | |
456 | ||
ac1bbaca | 457 | /* Implementation of linux target ops method "low_stopped_data_address". */ |
176eb98c | 458 | |
ac1bbaca TBA |
459 | CORE_ADDR |
460 | aarch64_target::low_stopped_data_address () | |
176eb98c MS |
461 | { |
462 | siginfo_t siginfo; | |
463 | int pid, i; | |
464 | struct aarch64_debug_reg_state *state; | |
465 | ||
0bfdf32f | 466 | pid = lwpid_of (current_thread); |
176eb98c MS |
467 | |
468 | /* Get the siginfo. */ | |
469 | if (ptrace (PTRACE_GETSIGINFO, pid, NULL, &siginfo) != 0) | |
470 | return (CORE_ADDR) 0; | |
471 | ||
472 | /* Need to be a hardware breakpoint/watchpoint trap. */ | |
473 | if (siginfo.si_signo != SIGTRAP | |
474 | || (siginfo.si_code & 0xffff) != 0x0004 /* TRAP_HWBKPT */) | |
475 | return (CORE_ADDR) 0; | |
476 | ||
477 | /* Check if the address matches any watched address. */ | |
88e2cf7e | 478 | state = aarch64_get_debug_reg_state (pid_of (current_thread)); |
176eb98c MS |
479 | for (i = aarch64_num_wp_regs - 1; i >= 0; --i) |
480 | { | |
a3b60e45 JK |
481 | const unsigned int offset |
482 | = aarch64_watchpoint_offset (state->dr_ctrl_wp[i]); | |
176eb98c MS |
483 | const unsigned int len = aarch64_watchpoint_length (state->dr_ctrl_wp[i]); |
484 | const CORE_ADDR addr_trap = (CORE_ADDR) siginfo.si_addr; | |
a3b60e45 JK |
485 | const CORE_ADDR addr_watch = state->dr_addr_wp[i] + offset; |
486 | const CORE_ADDR addr_watch_aligned = align_down (state->dr_addr_wp[i], 8); | |
487 | const CORE_ADDR addr_orig = state->dr_addr_orig_wp[i]; | |
488 | ||
176eb98c MS |
489 | if (state->dr_ref_count_wp[i] |
490 | && DR_CONTROL_ENABLED (state->dr_ctrl_wp[i]) | |
a3b60e45 | 491 | && addr_trap >= addr_watch_aligned |
176eb98c | 492 | && addr_trap < addr_watch + len) |
a3b60e45 JK |
493 | { |
494 | /* ADDR_TRAP reports the first address of the memory range | |
495 | accessed by the CPU, regardless of what was the memory | |
496 | range watched. Thus, a large CPU access that straddles | |
497 | the ADDR_WATCH..ADDR_WATCH+LEN range may result in an | |
498 | ADDR_TRAP that is lower than the | |
499 | ADDR_WATCH..ADDR_WATCH+LEN range. E.g.: | |
500 | ||
501 | addr: | 4 | 5 | 6 | 7 | 8 | | |
502 | |---- range watched ----| | |
503 | |----------- range accessed ------------| | |
504 | ||
505 | In this case, ADDR_TRAP will be 4. | |
506 | ||
507 | To match a watchpoint known to GDB core, we must never | |
508 | report *ADDR_P outside of any ADDR_WATCH..ADDR_WATCH+LEN | |
509 | range. ADDR_WATCH <= ADDR_TRAP < ADDR_ORIG is a false | |
510 | positive on kernels older than 4.10. See PR | |
511 | external/20207. */ | |
512 | return addr_orig; | |
513 | } | |
176eb98c MS |
514 | } |
515 | ||
516 | return (CORE_ADDR) 0; | |
517 | } | |
518 | ||
ac1bbaca | 519 | /* Implementation of linux target ops method "low_stopped_by_watchpoint". */ |
176eb98c | 520 | |
ac1bbaca TBA |
521 | bool |
522 | aarch64_target::low_stopped_by_watchpoint () | |
176eb98c | 523 | { |
ac1bbaca | 524 | return (low_stopped_data_address () != 0); |
176eb98c MS |
525 | } |
526 | ||
527 | /* Fetch the thread-local storage pointer for libthread_db. */ | |
528 | ||
529 | ps_err_e | |
754653a7 | 530 | ps_get_thread_area (struct ps_prochandle *ph, |
176eb98c MS |
531 | lwpid_t lwpid, int idx, void **base) |
532 | { | |
a0cc84cd YQ |
533 | return aarch64_ps_get_thread_area (ph, lwpid, idx, base, |
534 | is_64bit_tdesc ()); | |
176eb98c MS |
535 | } |
536 | ||
cb63de7c | 537 | /* Implementation of linux target ops method "low_siginfo_fixup". */ |
ade90bde | 538 | |
cb63de7c TBA |
539 | bool |
540 | aarch64_target::low_siginfo_fixup (siginfo_t *native, gdb_byte *inf, | |
541 | int direction) | |
ade90bde YQ |
542 | { |
543 | /* Is the inferior 32-bit? If so, then fixup the siginfo object. */ | |
544 | if (!is_64bit_tdesc ()) | |
545 | { | |
546 | if (direction == 0) | |
547 | aarch64_compat_siginfo_from_siginfo ((struct compat_siginfo *) inf, | |
548 | native); | |
549 | else | |
550 | aarch64_siginfo_from_compat_siginfo (native, | |
551 | (struct compat_siginfo *) inf); | |
552 | ||
cb63de7c | 553 | return true; |
ade90bde YQ |
554 | } |
555 | ||
cb63de7c | 556 | return false; |
ade90bde YQ |
557 | } |
558 | ||
fd000fb3 | 559 | /* Implementation of linux target ops method "low_new_process". */ |
176eb98c | 560 | |
fd000fb3 TBA |
561 | arch_process_info * |
562 | aarch64_target::low_new_process () | |
176eb98c | 563 | { |
8d749320 | 564 | struct arch_process_info *info = XCNEW (struct arch_process_info); |
176eb98c MS |
565 | |
566 | aarch64_init_debug_reg_state (&info->debug_reg_state); | |
567 | ||
568 | return info; | |
569 | } | |
570 | ||
fd000fb3 | 571 | /* Implementation of linux target ops method "low_delete_process". */ |
04ec7890 | 572 | |
fd000fb3 TBA |
573 | void |
574 | aarch64_target::low_delete_process (arch_process_info *info) | |
04ec7890 SM |
575 | { |
576 | xfree (info); | |
577 | } | |
578 | ||
fd000fb3 TBA |
579 | void |
580 | aarch64_target::low_new_thread (lwp_info *lwp) | |
581 | { | |
582 | aarch64_linux_new_thread (lwp); | |
583 | } | |
421530db | 584 | |
fd000fb3 TBA |
585 | void |
586 | aarch64_target::low_delete_thread (arch_lwp_info *arch_lwp) | |
587 | { | |
588 | aarch64_linux_delete_thread (arch_lwp); | |
589 | } | |
590 | ||
591 | /* Implementation of linux target ops method "low_new_fork". */ | |
592 | ||
593 | void | |
594 | aarch64_target::low_new_fork (process_info *parent, | |
595 | process_info *child) | |
3a8a0396 DB |
596 | { |
597 | /* These are allocated by linux_add_process. */ | |
61a7418c DB |
598 | gdb_assert (parent->priv != NULL |
599 | && parent->priv->arch_private != NULL); | |
600 | gdb_assert (child->priv != NULL | |
601 | && child->priv->arch_private != NULL); | |
3a8a0396 DB |
602 | |
603 | /* Linux kernel before 2.6.33 commit | |
604 | 72f674d203cd230426437cdcf7dd6f681dad8b0d | |
605 | will inherit hardware debug registers from parent | |
606 | on fork/vfork/clone. Newer Linux kernels create such tasks with | |
607 | zeroed debug registers. | |
608 | ||
609 | GDB core assumes the child inherits the watchpoints/hw | |
610 | breakpoints of the parent, and will remove them all from the | |
611 | forked off process. Copy the debug registers mirrors into the | |
612 | new process so that all breakpoints and watchpoints can be | |
613 | removed together. The debug registers mirror will become zeroed | |
614 | in the end before detaching the forked off process, thus making | |
615 | this compatible with older Linux kernels too. */ | |
616 | ||
61a7418c | 617 | *child->priv->arch_private = *parent->priv->arch_private; |
3a8a0396 DB |
618 | } |
619 | ||
ee4fbcfa AH |
620 | /* Matches HWCAP_PACA in kernel header arch/arm64/include/uapi/asm/hwcap.h. */ |
621 | #define AARCH64_HWCAP_PACA (1 << 30) | |
622 | ||
797bcff5 | 623 | /* Implementation of linux target ops method "low_arch_setup". */ |
3b53ae99 | 624 | |
797bcff5 TBA |
625 | void |
626 | aarch64_target::low_arch_setup () | |
3b53ae99 YQ |
627 | { |
628 | unsigned int machine; | |
629 | int is_elf64; | |
630 | int tid; | |
631 | ||
632 | tid = lwpid_of (current_thread); | |
633 | ||
634 | is_elf64 = linux_pid_exe_is_elf_64_file (tid, &machine); | |
635 | ||
636 | if (is_elf64) | |
fefa175e AH |
637 | { |
638 | uint64_t vq = aarch64_sve_get_vq (tid); | |
974c89e0 AH |
639 | unsigned long hwcap = linux_get_hwcap (8); |
640 | bool pauth_p = hwcap & AARCH64_HWCAP_PACA; | |
ee4fbcfa AH |
641 | |
642 | current_process ()->tdesc = aarch64_linux_read_description (vq, pauth_p); | |
fefa175e | 643 | } |
3b53ae99 | 644 | else |
7cc17433 | 645 | current_process ()->tdesc = aarch32_linux_read_description (); |
176eb98c | 646 | |
af1b22f3 | 647 | aarch64_linux_get_debug_reg_capacity (lwpid_of (current_thread)); |
176eb98c MS |
648 | } |
649 | ||
02895270 AH |
650 | /* Wrapper for aarch64_sve_regs_copy_to_reg_buf. */ |
651 | ||
652 | static void | |
653 | aarch64_sve_regs_copy_to_regcache (struct regcache *regcache, const void *buf) | |
654 | { | |
655 | return aarch64_sve_regs_copy_to_reg_buf (regcache, buf); | |
656 | } | |
657 | ||
658 | /* Wrapper for aarch64_sve_regs_copy_from_reg_buf. */ | |
659 | ||
660 | static void | |
661 | aarch64_sve_regs_copy_from_regcache (struct regcache *regcache, void *buf) | |
662 | { | |
663 | return aarch64_sve_regs_copy_from_reg_buf (regcache, buf); | |
664 | } | |
665 | ||
3aee8918 | 666 | static struct regset_info aarch64_regsets[] = |
176eb98c MS |
667 | { |
668 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
669 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
670 | aarch64_fill_gregset, aarch64_store_gregset }, | |
671 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_FPREGSET, | |
672 | sizeof (struct user_fpsimd_state), FP_REGS, | |
673 | aarch64_fill_fpregset, aarch64_store_fpregset | |
674 | }, | |
1ef53e6b AH |
675 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK, |
676 | AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS, | |
677 | NULL, aarch64_store_pauthregset }, | |
50bc912a | 678 | NULL_REGSET |
176eb98c MS |
679 | }; |
680 | ||
3aee8918 PA |
681 | static struct regsets_info aarch64_regsets_info = |
682 | { | |
683 | aarch64_regsets, /* regsets */ | |
684 | 0, /* num_regsets */ | |
685 | NULL, /* disabled_regsets */ | |
686 | }; | |
687 | ||
3b53ae99 | 688 | static struct regs_info regs_info_aarch64 = |
3aee8918 PA |
689 | { |
690 | NULL, /* regset_bitmap */ | |
c2d65f38 | 691 | NULL, /* usrregs */ |
3aee8918 PA |
692 | &aarch64_regsets_info, |
693 | }; | |
694 | ||
02895270 AH |
695 | static struct regset_info aarch64_sve_regsets[] = |
696 | { | |
697 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_PRSTATUS, | |
698 | sizeof (struct user_pt_regs), GENERAL_REGS, | |
699 | aarch64_fill_gregset, aarch64_store_gregset }, | |
700 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_SVE, | |
701 | SVE_PT_SIZE (AARCH64_MAX_SVE_VQ, SVE_PT_REGS_SVE), EXTENDED_REGS, | |
702 | aarch64_sve_regs_copy_from_regcache, aarch64_sve_regs_copy_to_regcache | |
703 | }, | |
1ef53e6b AH |
704 | { PTRACE_GETREGSET, PTRACE_SETREGSET, NT_ARM_PAC_MASK, |
705 | AARCH64_PAUTH_REGS_SIZE, OPTIONAL_REGS, | |
706 | NULL, aarch64_store_pauthregset }, | |
02895270 AH |
707 | NULL_REGSET |
708 | }; | |
709 | ||
710 | static struct regsets_info aarch64_sve_regsets_info = | |
711 | { | |
712 | aarch64_sve_regsets, /* regsets. */ | |
713 | 0, /* num_regsets. */ | |
714 | NULL, /* disabled_regsets. */ | |
715 | }; | |
716 | ||
717 | static struct regs_info regs_info_aarch64_sve = | |
718 | { | |
719 | NULL, /* regset_bitmap. */ | |
720 | NULL, /* usrregs. */ | |
721 | &aarch64_sve_regsets_info, | |
722 | }; | |
723 | ||
aa8d21c9 | 724 | /* Implementation of linux target ops method "get_regs_info". */ |
421530db | 725 | |
aa8d21c9 TBA |
726 | const regs_info * |
727 | aarch64_target::get_regs_info () | |
3aee8918 | 728 | { |
02895270 | 729 | if (!is_64bit_tdesc ()) |
3b53ae99 | 730 | return ®s_info_aarch32; |
02895270 AH |
731 | |
732 | if (is_sve_tdesc ()) | |
733 | return ®s_info_aarch64_sve; | |
734 | ||
735 | return ®s_info_aarch64; | |
3aee8918 PA |
736 | } |
737 | ||
47f70aa7 | 738 | /* Implementation of target ops method "supports_tracepoints". */ |
7671bf47 | 739 | |
47f70aa7 TBA |
740 | bool |
741 | aarch64_target::supports_tracepoints () | |
7671bf47 | 742 | { |
524b57e6 | 743 | if (current_thread == NULL) |
47f70aa7 | 744 | return true; |
524b57e6 YQ |
745 | else |
746 | { | |
747 | /* We don't support tracepoints on aarch32 now. */ | |
748 | return is_64bit_tdesc (); | |
749 | } | |
7671bf47 PL |
750 | } |
751 | ||
13e567af | 752 | /* Implementation of linux target ops method "low_get_thread_area". */ |
bb903df0 | 753 | |
13e567af TBA |
754 | int |
755 | aarch64_target::low_get_thread_area (int lwpid, CORE_ADDR *addrp) | |
bb903df0 PL |
756 | { |
757 | struct iovec iovec; | |
758 | uint64_t reg; | |
759 | ||
760 | iovec.iov_base = ® | |
761 | iovec.iov_len = sizeof (reg); | |
762 | ||
763 | if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0) | |
764 | return -1; | |
765 | ||
766 | *addrp = reg; | |
767 | ||
768 | return 0; | |
769 | } | |
770 | ||
061fc021 YQ |
771 | /* Implementation of linux_target_ops method "get_syscall_trapinfo". */ |
772 | ||
773 | static void | |
774 | aarch64_get_syscall_trapinfo (struct regcache *regcache, int *sysno) | |
775 | { | |
776 | int use_64bit = register_size (regcache->tdesc, 0) == 8; | |
777 | ||
778 | if (use_64bit) | |
779 | { | |
780 | long l_sysno; | |
781 | ||
782 | collect_register_by_name (regcache, "x8", &l_sysno); | |
783 | *sysno = (int) l_sysno; | |
784 | } | |
785 | else | |
786 | collect_register_by_name (regcache, "r7", sysno); | |
787 | } | |
788 | ||
afbe19f8 PL |
789 | /* List of condition codes that we need. */ |
790 | ||
791 | enum aarch64_condition_codes | |
792 | { | |
793 | EQ = 0x0, | |
794 | NE = 0x1, | |
795 | LO = 0x3, | |
796 | GE = 0xa, | |
797 | LT = 0xb, | |
798 | GT = 0xc, | |
799 | LE = 0xd, | |
bb903df0 PL |
800 | }; |
801 | ||
6c1c9a8b YQ |
802 | enum aarch64_operand_type |
803 | { | |
804 | OPERAND_IMMEDIATE, | |
805 | OPERAND_REGISTER, | |
806 | }; | |
807 | ||
bb903df0 PL |
808 | /* Representation of an operand. At this time, it only supports register |
809 | and immediate types. */ | |
810 | ||
811 | struct aarch64_operand | |
812 | { | |
813 | /* Type of the operand. */ | |
6c1c9a8b YQ |
814 | enum aarch64_operand_type type; |
815 | ||
bb903df0 PL |
816 | /* Value of the operand according to the type. */ |
817 | union | |
818 | { | |
819 | uint32_t imm; | |
820 | struct aarch64_register reg; | |
821 | }; | |
822 | }; | |
823 | ||
824 | /* List of registers that we are currently using, we can add more here as | |
825 | we need to use them. */ | |
826 | ||
827 | /* General purpose scratch registers (64 bit). */ | |
828 | static const struct aarch64_register x0 = { 0, 1 }; | |
829 | static const struct aarch64_register x1 = { 1, 1 }; | |
830 | static const struct aarch64_register x2 = { 2, 1 }; | |
831 | static const struct aarch64_register x3 = { 3, 1 }; | |
832 | static const struct aarch64_register x4 = { 4, 1 }; | |
833 | ||
834 | /* General purpose scratch registers (32 bit). */ | |
afbe19f8 | 835 | static const struct aarch64_register w0 = { 0, 0 }; |
bb903df0 PL |
836 | static const struct aarch64_register w2 = { 2, 0 }; |
837 | ||
838 | /* Intra-procedure scratch registers. */ | |
839 | static const struct aarch64_register ip0 = { 16, 1 }; | |
840 | ||
841 | /* Special purpose registers. */ | |
afbe19f8 PL |
842 | static const struct aarch64_register fp = { 29, 1 }; |
843 | static const struct aarch64_register lr = { 30, 1 }; | |
bb903df0 PL |
844 | static const struct aarch64_register sp = { 31, 1 }; |
845 | static const struct aarch64_register xzr = { 31, 1 }; | |
846 | ||
847 | /* Dynamically allocate a new register. If we know the register | |
848 | statically, we should make it a global as above instead of using this | |
849 | helper function. */ | |
850 | ||
851 | static struct aarch64_register | |
852 | aarch64_register (unsigned num, int is64) | |
853 | { | |
854 | return (struct aarch64_register) { num, is64 }; | |
855 | } | |
856 | ||
857 | /* Helper function to create a register operand, for instructions with | |
858 | different types of operands. | |
859 | ||
860 | For example: | |
861 | p += emit_mov (p, x0, register_operand (x1)); */ | |
862 | ||
863 | static struct aarch64_operand | |
864 | register_operand (struct aarch64_register reg) | |
865 | { | |
866 | struct aarch64_operand operand; | |
867 | ||
868 | operand.type = OPERAND_REGISTER; | |
869 | operand.reg = reg; | |
870 | ||
871 | return operand; | |
872 | } | |
873 | ||
874 | /* Helper function to create an immediate operand, for instructions with | |
875 | different types of operands. | |
876 | ||
877 | For example: | |
878 | p += emit_mov (p, x0, immediate_operand (12)); */ | |
879 | ||
880 | static struct aarch64_operand | |
881 | immediate_operand (uint32_t imm) | |
882 | { | |
883 | struct aarch64_operand operand; | |
884 | ||
885 | operand.type = OPERAND_IMMEDIATE; | |
886 | operand.imm = imm; | |
887 | ||
888 | return operand; | |
889 | } | |
890 | ||
bb903df0 PL |
891 | /* Helper function to create an offset memory operand. |
892 | ||
893 | For example: | |
894 | p += emit_ldr (p, x0, sp, offset_memory_operand (16)); */ | |
895 | ||
896 | static struct aarch64_memory_operand | |
897 | offset_memory_operand (int32_t offset) | |
898 | { | |
899 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_OFFSET, offset }; | |
900 | } | |
901 | ||
902 | /* Helper function to create a pre-index memory operand. | |
903 | ||
904 | For example: | |
905 | p += emit_ldr (p, x0, sp, preindex_memory_operand (16)); */ | |
906 | ||
907 | static struct aarch64_memory_operand | |
908 | preindex_memory_operand (int32_t index) | |
909 | { | |
910 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_PREINDEX, index }; | |
911 | } | |
912 | ||
afbe19f8 PL |
913 | /* Helper function to create a post-index memory operand. |
914 | ||
915 | For example: | |
916 | p += emit_ldr (p, x0, sp, postindex_memory_operand (16)); */ | |
917 | ||
918 | static struct aarch64_memory_operand | |
919 | postindex_memory_operand (int32_t index) | |
920 | { | |
921 | return (struct aarch64_memory_operand) { MEMORY_OPERAND_POSTINDEX, index }; | |
922 | } | |
923 | ||
bb903df0 PL |
924 | /* System control registers. These special registers can be written and |
925 | read with the MRS and MSR instructions. | |
926 | ||
927 | - NZCV: Condition flags. GDB refers to this register under the CPSR | |
928 | name. | |
929 | - FPSR: Floating-point status register. | |
930 | - FPCR: Floating-point control registers. | |
931 | - TPIDR_EL0: Software thread ID register. */ | |
932 | ||
933 | enum aarch64_system_control_registers | |
934 | { | |
935 | /* op0 op1 crn crm op2 */ | |
936 | NZCV = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x2 << 3) | 0x0, | |
937 | FPSR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x1, | |
938 | FPCR = (0x1 << 14) | (0x3 << 11) | (0x4 << 7) | (0x4 << 3) | 0x0, | |
939 | TPIDR_EL0 = (0x1 << 14) | (0x3 << 11) | (0xd << 7) | (0x0 << 3) | 0x2 | |
940 | }; | |
941 | ||
bb903df0 PL |
942 | /* Write a BLR instruction into *BUF. |
943 | ||
944 | BLR rn | |
945 | ||
946 | RN is the register to branch to. */ | |
947 | ||
948 | static int | |
949 | emit_blr (uint32_t *buf, struct aarch64_register rn) | |
950 | { | |
e1c587c3 | 951 | return aarch64_emit_insn (buf, BLR | ENCODE (rn.num, 5, 5)); |
bb903df0 PL |
952 | } |
953 | ||
afbe19f8 | 954 | /* Write a RET instruction into *BUF. |
bb903df0 | 955 | |
afbe19f8 | 956 | RET xn |
bb903df0 | 957 | |
afbe19f8 | 958 | RN is the register to branch to. */ |
bb903df0 PL |
959 | |
960 | static int | |
afbe19f8 PL |
961 | emit_ret (uint32_t *buf, struct aarch64_register rn) |
962 | { | |
e1c587c3 | 963 | return aarch64_emit_insn (buf, RET | ENCODE (rn.num, 5, 5)); |
afbe19f8 PL |
964 | } |
965 | ||
966 | static int | |
967 | emit_load_store_pair (uint32_t *buf, enum aarch64_opcodes opcode, | |
968 | struct aarch64_register rt, | |
969 | struct aarch64_register rt2, | |
970 | struct aarch64_register rn, | |
971 | struct aarch64_memory_operand operand) | |
bb903df0 PL |
972 | { |
973 | uint32_t opc; | |
974 | uint32_t pre_index; | |
975 | uint32_t write_back; | |
976 | ||
977 | if (rt.is64) | |
978 | opc = ENCODE (2, 2, 30); | |
979 | else | |
980 | opc = ENCODE (0, 2, 30); | |
981 | ||
982 | switch (operand.type) | |
983 | { | |
984 | case MEMORY_OPERAND_OFFSET: | |
985 | { | |
986 | pre_index = ENCODE (1, 1, 24); | |
987 | write_back = ENCODE (0, 1, 23); | |
988 | break; | |
989 | } | |
afbe19f8 PL |
990 | case MEMORY_OPERAND_POSTINDEX: |
991 | { | |
992 | pre_index = ENCODE (0, 1, 24); | |
993 | write_back = ENCODE (1, 1, 23); | |
994 | break; | |
995 | } | |
bb903df0 PL |
996 | case MEMORY_OPERAND_PREINDEX: |
997 | { | |
998 | pre_index = ENCODE (1, 1, 24); | |
999 | write_back = ENCODE (1, 1, 23); | |
1000 | break; | |
1001 | } | |
1002 | default: | |
1003 | return 0; | |
1004 | } | |
1005 | ||
e1c587c3 YQ |
1006 | return aarch64_emit_insn (buf, opcode | opc | pre_index | write_back |
1007 | | ENCODE (operand.index >> 3, 7, 15) | |
1008 | | ENCODE (rt2.num, 5, 10) | |
1009 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1010 | } |
1011 | ||
afbe19f8 PL |
1012 | /* Write a STP instruction into *BUF. |
1013 | ||
1014 | STP rt, rt2, [rn, #offset] | |
1015 | STP rt, rt2, [rn, #index]! | |
1016 | STP rt, rt2, [rn], #index | |
1017 | ||
1018 | RT and RT2 are the registers to store. | |
1019 | RN is the base address register. | |
1020 | OFFSET is the immediate to add to the base address. It is limited to a | |
1021 | -512 .. 504 range (7 bits << 3). */ | |
1022 | ||
1023 | static int | |
1024 | emit_stp (uint32_t *buf, struct aarch64_register rt, | |
1025 | struct aarch64_register rt2, struct aarch64_register rn, | |
1026 | struct aarch64_memory_operand operand) | |
1027 | { | |
1028 | return emit_load_store_pair (buf, STP, rt, rt2, rn, operand); | |
1029 | } | |
1030 | ||
1031 | /* Write a LDP instruction into *BUF. | |
1032 | ||
1033 | LDP rt, rt2, [rn, #offset] | |
1034 | LDP rt, rt2, [rn, #index]! | |
1035 | LDP rt, rt2, [rn], #index | |
1036 | ||
1037 | RT and RT2 are the registers to store. | |
1038 | RN is the base address register. | |
1039 | OFFSET is the immediate to add to the base address. It is limited to a | |
1040 | -512 .. 504 range (7 bits << 3). */ | |
1041 | ||
1042 | static int | |
1043 | emit_ldp (uint32_t *buf, struct aarch64_register rt, | |
1044 | struct aarch64_register rt2, struct aarch64_register rn, | |
1045 | struct aarch64_memory_operand operand) | |
1046 | { | |
1047 | return emit_load_store_pair (buf, LDP, rt, rt2, rn, operand); | |
1048 | } | |
1049 | ||
bb903df0 PL |
1050 | /* Write a LDP (SIMD&VFP) instruction using Q registers into *BUF. |
1051 | ||
1052 | LDP qt, qt2, [rn, #offset] | |
1053 | ||
1054 | RT and RT2 are the Q registers to store. | |
1055 | RN is the base address register. | |
1056 | OFFSET is the immediate to add to the base address. It is limited to | |
1057 | -1024 .. 1008 range (7 bits << 4). */ | |
1058 | ||
1059 | static int | |
1060 | emit_ldp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
1061 | struct aarch64_register rn, int32_t offset) | |
1062 | { | |
1063 | uint32_t opc = ENCODE (2, 2, 30); | |
1064 | uint32_t pre_index = ENCODE (1, 1, 24); | |
1065 | ||
e1c587c3 YQ |
1066 | return aarch64_emit_insn (buf, LDP_SIMD_VFP | opc | pre_index |
1067 | | ENCODE (offset >> 4, 7, 15) | |
1068 | | ENCODE (rt2, 5, 10) | |
1069 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
1070 | } |
1071 | ||
1072 | /* Write a STP (SIMD&VFP) instruction using Q registers into *BUF. | |
1073 | ||
1074 | STP qt, qt2, [rn, #offset] | |
1075 | ||
1076 | RT and RT2 are the Q registers to store. | |
1077 | RN is the base address register. | |
1078 | OFFSET is the immediate to add to the base address. It is limited to | |
1079 | -1024 .. 1008 range (7 bits << 4). */ | |
1080 | ||
1081 | static int | |
1082 | emit_stp_q_offset (uint32_t *buf, unsigned rt, unsigned rt2, | |
1083 | struct aarch64_register rn, int32_t offset) | |
1084 | { | |
1085 | uint32_t opc = ENCODE (2, 2, 30); | |
1086 | uint32_t pre_index = ENCODE (1, 1, 24); | |
1087 | ||
e1c587c3 | 1088 | return aarch64_emit_insn (buf, STP_SIMD_VFP | opc | pre_index |
b6542f81 YQ |
1089 | | ENCODE (offset >> 4, 7, 15) |
1090 | | ENCODE (rt2, 5, 10) | |
1091 | | ENCODE (rn.num, 5, 5) | ENCODE (rt, 5, 0)); | |
bb903df0 PL |
1092 | } |
1093 | ||
afbe19f8 PL |
1094 | /* Write a LDRH instruction into *BUF. |
1095 | ||
1096 | LDRH wt, [xn, #offset] | |
1097 | LDRH wt, [xn, #index]! | |
1098 | LDRH wt, [xn], #index | |
1099 | ||
1100 | RT is the register to store. | |
1101 | RN is the base address register. | |
1102 | OFFSET is the immediate to add to the base address. It is limited to | |
1103 | 0 .. 32760 range (12 bits << 3). */ | |
1104 | ||
1105 | static int | |
1106 | emit_ldrh (uint32_t *buf, struct aarch64_register rt, | |
1107 | struct aarch64_register rn, | |
1108 | struct aarch64_memory_operand operand) | |
1109 | { | |
1c2e1515 | 1110 | return aarch64_emit_load_store (buf, 1, LDR, rt, rn, operand); |
afbe19f8 PL |
1111 | } |
1112 | ||
1113 | /* Write a LDRB instruction into *BUF. | |
1114 | ||
1115 | LDRB wt, [xn, #offset] | |
1116 | LDRB wt, [xn, #index]! | |
1117 | LDRB wt, [xn], #index | |
1118 | ||
1119 | RT is the register to store. | |
1120 | RN is the base address register. | |
1121 | OFFSET is the immediate to add to the base address. It is limited to | |
1122 | 0 .. 32760 range (12 bits << 3). */ | |
1123 | ||
1124 | static int | |
1125 | emit_ldrb (uint32_t *buf, struct aarch64_register rt, | |
1126 | struct aarch64_register rn, | |
1127 | struct aarch64_memory_operand operand) | |
1128 | { | |
1c2e1515 | 1129 | return aarch64_emit_load_store (buf, 0, LDR, rt, rn, operand); |
afbe19f8 PL |
1130 | } |
1131 | ||
bb903df0 | 1132 | |
bb903df0 PL |
1133 | |
1134 | /* Write a STR instruction into *BUF. | |
1135 | ||
1136 | STR rt, [rn, #offset] | |
1137 | STR rt, [rn, #index]! | |
afbe19f8 | 1138 | STR rt, [rn], #index |
bb903df0 PL |
1139 | |
1140 | RT is the register to store. | |
1141 | RN is the base address register. | |
1142 | OFFSET is the immediate to add to the base address. It is limited to | |
1143 | 0 .. 32760 range (12 bits << 3). */ | |
1144 | ||
1145 | static int | |
1146 | emit_str (uint32_t *buf, struct aarch64_register rt, | |
1147 | struct aarch64_register rn, | |
1148 | struct aarch64_memory_operand operand) | |
1149 | { | |
1c2e1515 | 1150 | return aarch64_emit_load_store (buf, rt.is64 ? 3 : 2, STR, rt, rn, operand); |
bb903df0 PL |
1151 | } |
1152 | ||
1153 | /* Helper function emitting an exclusive load or store instruction. */ | |
1154 | ||
1155 | static int | |
1156 | emit_load_store_exclusive (uint32_t *buf, uint32_t size, | |
1157 | enum aarch64_opcodes opcode, | |
1158 | struct aarch64_register rs, | |
1159 | struct aarch64_register rt, | |
1160 | struct aarch64_register rt2, | |
1161 | struct aarch64_register rn) | |
1162 | { | |
e1c587c3 YQ |
1163 | return aarch64_emit_insn (buf, opcode | ENCODE (size, 2, 30) |
1164 | | ENCODE (rs.num, 5, 16) | ENCODE (rt2.num, 5, 10) | |
1165 | | ENCODE (rn.num, 5, 5) | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1166 | } |
1167 | ||
1168 | /* Write a LAXR instruction into *BUF. | |
1169 | ||
1170 | LDAXR rt, [xn] | |
1171 | ||
1172 | RT is the destination register. | |
1173 | RN is the base address register. */ | |
1174 | ||
1175 | static int | |
1176 | emit_ldaxr (uint32_t *buf, struct aarch64_register rt, | |
1177 | struct aarch64_register rn) | |
1178 | { | |
1179 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, LDAXR, xzr, rt, | |
1180 | xzr, rn); | |
1181 | } | |
1182 | ||
1183 | /* Write a STXR instruction into *BUF. | |
1184 | ||
1185 | STXR ws, rt, [xn] | |
1186 | ||
1187 | RS is the result register, it indicates if the store succeeded or not. | |
1188 | RT is the destination register. | |
1189 | RN is the base address register. */ | |
1190 | ||
1191 | static int | |
1192 | emit_stxr (uint32_t *buf, struct aarch64_register rs, | |
1193 | struct aarch64_register rt, struct aarch64_register rn) | |
1194 | { | |
1195 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STXR, rs, rt, | |
1196 | xzr, rn); | |
1197 | } | |
1198 | ||
1199 | /* Write a STLR instruction into *BUF. | |
1200 | ||
1201 | STLR rt, [xn] | |
1202 | ||
1203 | RT is the register to store. | |
1204 | RN is the base address register. */ | |
1205 | ||
1206 | static int | |
1207 | emit_stlr (uint32_t *buf, struct aarch64_register rt, | |
1208 | struct aarch64_register rn) | |
1209 | { | |
1210 | return emit_load_store_exclusive (buf, rt.is64 ? 3 : 2, STLR, xzr, rt, | |
1211 | xzr, rn); | |
1212 | } | |
1213 | ||
1214 | /* Helper function for data processing instructions with register sources. */ | |
1215 | ||
1216 | static int | |
231c0592 | 1217 | emit_data_processing_reg (uint32_t *buf, uint32_t opcode, |
bb903df0 PL |
1218 | struct aarch64_register rd, |
1219 | struct aarch64_register rn, | |
1220 | struct aarch64_register rm) | |
1221 | { | |
1222 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1223 | ||
e1c587c3 YQ |
1224 | return aarch64_emit_insn (buf, opcode | size | ENCODE (rm.num, 5, 16) |
1225 | | ENCODE (rn.num, 5, 5) | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1226 | } |
1227 | ||
1228 | /* Helper function for data processing instructions taking either a register | |
1229 | or an immediate. */ | |
1230 | ||
1231 | static int | |
1232 | emit_data_processing (uint32_t *buf, enum aarch64_opcodes opcode, | |
1233 | struct aarch64_register rd, | |
1234 | struct aarch64_register rn, | |
1235 | struct aarch64_operand operand) | |
1236 | { | |
1237 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1238 | /* The opcode is different for register and immediate source operands. */ | |
1239 | uint32_t operand_opcode; | |
1240 | ||
1241 | if (operand.type == OPERAND_IMMEDIATE) | |
1242 | { | |
1243 | /* xxx1 000x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1244 | operand_opcode = ENCODE (8, 4, 25); | |
1245 | ||
e1c587c3 YQ |
1246 | return aarch64_emit_insn (buf, opcode | operand_opcode | size |
1247 | | ENCODE (operand.imm, 12, 10) | |
1248 | | ENCODE (rn.num, 5, 5) | |
1249 | | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1250 | } |
1251 | else | |
1252 | { | |
1253 | /* xxx0 101x xxxx xxxx xxxx xxxx xxxx xxxx */ | |
1254 | operand_opcode = ENCODE (5, 4, 25); | |
1255 | ||
1256 | return emit_data_processing_reg (buf, opcode | operand_opcode, rd, | |
1257 | rn, operand.reg); | |
1258 | } | |
1259 | } | |
1260 | ||
1261 | /* Write an ADD instruction into *BUF. | |
1262 | ||
1263 | ADD rd, rn, #imm | |
1264 | ADD rd, rn, rm | |
1265 | ||
1266 | This function handles both an immediate and register add. | |
1267 | ||
1268 | RD is the destination register. | |
1269 | RN is the input register. | |
1270 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1271 | OPERAND_REGISTER. */ | |
1272 | ||
1273 | static int | |
1274 | emit_add (uint32_t *buf, struct aarch64_register rd, | |
1275 | struct aarch64_register rn, struct aarch64_operand operand) | |
1276 | { | |
1277 | return emit_data_processing (buf, ADD, rd, rn, operand); | |
1278 | } | |
1279 | ||
1280 | /* Write a SUB instruction into *BUF. | |
1281 | ||
1282 | SUB rd, rn, #imm | |
1283 | SUB rd, rn, rm | |
1284 | ||
1285 | This function handles both an immediate and register sub. | |
1286 | ||
1287 | RD is the destination register. | |
1288 | RN is the input register. | |
1289 | IMM is the immediate to substract to RN. */ | |
1290 | ||
1291 | static int | |
1292 | emit_sub (uint32_t *buf, struct aarch64_register rd, | |
1293 | struct aarch64_register rn, struct aarch64_operand operand) | |
1294 | { | |
1295 | return emit_data_processing (buf, SUB, rd, rn, operand); | |
1296 | } | |
1297 | ||
1298 | /* Write a MOV instruction into *BUF. | |
1299 | ||
1300 | MOV rd, #imm | |
1301 | MOV rd, rm | |
1302 | ||
1303 | This function handles both a wide immediate move and a register move, | |
1304 | with the condition that the source register is not xzr. xzr and the | |
1305 | stack pointer share the same encoding and this function only supports | |
1306 | the stack pointer. | |
1307 | ||
1308 | RD is the destination register. | |
1309 | OPERAND is the source operand, either of type OPERAND_IMMEDIATE or | |
1310 | OPERAND_REGISTER. */ | |
1311 | ||
1312 | static int | |
1313 | emit_mov (uint32_t *buf, struct aarch64_register rd, | |
1314 | struct aarch64_operand operand) | |
1315 | { | |
1316 | if (operand.type == OPERAND_IMMEDIATE) | |
1317 | { | |
1318 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1319 | /* Do not shift the immediate. */ | |
1320 | uint32_t shift = ENCODE (0, 2, 21); | |
1321 | ||
e1c587c3 YQ |
1322 | return aarch64_emit_insn (buf, MOV | size | shift |
1323 | | ENCODE (operand.imm, 16, 5) | |
1324 | | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1325 | } |
1326 | else | |
1327 | return emit_add (buf, rd, operand.reg, immediate_operand (0)); | |
1328 | } | |
1329 | ||
1330 | /* Write a MOVK instruction into *BUF. | |
1331 | ||
1332 | MOVK rd, #imm, lsl #shift | |
1333 | ||
1334 | RD is the destination register. | |
1335 | IMM is the immediate. | |
1336 | SHIFT is the logical shift left to apply to IMM. */ | |
1337 | ||
1338 | static int | |
7781c06f YQ |
1339 | emit_movk (uint32_t *buf, struct aarch64_register rd, uint32_t imm, |
1340 | unsigned shift) | |
bb903df0 PL |
1341 | { |
1342 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1343 | ||
e1c587c3 YQ |
1344 | return aarch64_emit_insn (buf, MOVK | size | ENCODE (shift, 2, 21) | |
1345 | ENCODE (imm, 16, 5) | ENCODE (rd.num, 5, 0)); | |
bb903df0 PL |
1346 | } |
1347 | ||
1348 | /* Write instructions into *BUF in order to move ADDR into a register. | |
1349 | ADDR can be a 64-bit value. | |
1350 | ||
1351 | This function will emit a series of MOV and MOVK instructions, such as: | |
1352 | ||
1353 | MOV xd, #(addr) | |
1354 | MOVK xd, #(addr >> 16), lsl #16 | |
1355 | MOVK xd, #(addr >> 32), lsl #32 | |
1356 | MOVK xd, #(addr >> 48), lsl #48 */ | |
1357 | ||
1358 | static int | |
1359 | emit_mov_addr (uint32_t *buf, struct aarch64_register rd, CORE_ADDR addr) | |
1360 | { | |
1361 | uint32_t *p = buf; | |
1362 | ||
1363 | /* The MOV (wide immediate) instruction clears to top bits of the | |
1364 | register. */ | |
1365 | p += emit_mov (p, rd, immediate_operand (addr & 0xffff)); | |
1366 | ||
1367 | if ((addr >> 16) != 0) | |
1368 | p += emit_movk (p, rd, (addr >> 16) & 0xffff, 1); | |
1369 | else | |
1370 | return p - buf; | |
1371 | ||
1372 | if ((addr >> 32) != 0) | |
1373 | p += emit_movk (p, rd, (addr >> 32) & 0xffff, 2); | |
1374 | else | |
1375 | return p - buf; | |
1376 | ||
1377 | if ((addr >> 48) != 0) | |
1378 | p += emit_movk (p, rd, (addr >> 48) & 0xffff, 3); | |
1379 | ||
1380 | return p - buf; | |
1381 | } | |
1382 | ||
afbe19f8 PL |
1383 | /* Write a SUBS instruction into *BUF. |
1384 | ||
1385 | SUBS rd, rn, rm | |
1386 | ||
1387 | This instruction update the condition flags. | |
1388 | ||
1389 | RD is the destination register. | |
1390 | RN and RM are the source registers. */ | |
1391 | ||
1392 | static int | |
1393 | emit_subs (uint32_t *buf, struct aarch64_register rd, | |
1394 | struct aarch64_register rn, struct aarch64_operand operand) | |
1395 | { | |
1396 | return emit_data_processing (buf, SUBS, rd, rn, operand); | |
1397 | } | |
1398 | ||
1399 | /* Write a CMP instruction into *BUF. | |
1400 | ||
1401 | CMP rn, rm | |
1402 | ||
1403 | This instruction is an alias of SUBS xzr, rn, rm. | |
1404 | ||
1405 | RN and RM are the registers to compare. */ | |
1406 | ||
1407 | static int | |
1408 | emit_cmp (uint32_t *buf, struct aarch64_register rn, | |
1409 | struct aarch64_operand operand) | |
1410 | { | |
1411 | return emit_subs (buf, xzr, rn, operand); | |
1412 | } | |
1413 | ||
1414 | /* Write a AND instruction into *BUF. | |
1415 | ||
1416 | AND rd, rn, rm | |
1417 | ||
1418 | RD is the destination register. | |
1419 | RN and RM are the source registers. */ | |
1420 | ||
1421 | static int | |
1422 | emit_and (uint32_t *buf, struct aarch64_register rd, | |
1423 | struct aarch64_register rn, struct aarch64_register rm) | |
1424 | { | |
1425 | return emit_data_processing_reg (buf, AND, rd, rn, rm); | |
1426 | } | |
1427 | ||
1428 | /* Write a ORR instruction into *BUF. | |
1429 | ||
1430 | ORR rd, rn, rm | |
1431 | ||
1432 | RD is the destination register. | |
1433 | RN and RM are the source registers. */ | |
1434 | ||
1435 | static int | |
1436 | emit_orr (uint32_t *buf, struct aarch64_register rd, | |
1437 | struct aarch64_register rn, struct aarch64_register rm) | |
1438 | { | |
1439 | return emit_data_processing_reg (buf, ORR, rd, rn, rm); | |
1440 | } | |
1441 | ||
1442 | /* Write a ORN instruction into *BUF. | |
1443 | ||
1444 | ORN rd, rn, rm | |
1445 | ||
1446 | RD is the destination register. | |
1447 | RN and RM are the source registers. */ | |
1448 | ||
1449 | static int | |
1450 | emit_orn (uint32_t *buf, struct aarch64_register rd, | |
1451 | struct aarch64_register rn, struct aarch64_register rm) | |
1452 | { | |
1453 | return emit_data_processing_reg (buf, ORN, rd, rn, rm); | |
1454 | } | |
1455 | ||
1456 | /* Write a EOR instruction into *BUF. | |
1457 | ||
1458 | EOR rd, rn, rm | |
1459 | ||
1460 | RD is the destination register. | |
1461 | RN and RM are the source registers. */ | |
1462 | ||
1463 | static int | |
1464 | emit_eor (uint32_t *buf, struct aarch64_register rd, | |
1465 | struct aarch64_register rn, struct aarch64_register rm) | |
1466 | { | |
1467 | return emit_data_processing_reg (buf, EOR, rd, rn, rm); | |
1468 | } | |
1469 | ||
1470 | /* Write a MVN instruction into *BUF. | |
1471 | ||
1472 | MVN rd, rm | |
1473 | ||
1474 | This is an alias for ORN rd, xzr, rm. | |
1475 | ||
1476 | RD is the destination register. | |
1477 | RM is the source register. */ | |
1478 | ||
1479 | static int | |
1480 | emit_mvn (uint32_t *buf, struct aarch64_register rd, | |
1481 | struct aarch64_register rm) | |
1482 | { | |
1483 | return emit_orn (buf, rd, xzr, rm); | |
1484 | } | |
1485 | ||
1486 | /* Write a LSLV instruction into *BUF. | |
1487 | ||
1488 | LSLV rd, rn, rm | |
1489 | ||
1490 | RD is the destination register. | |
1491 | RN and RM are the source registers. */ | |
1492 | ||
1493 | static int | |
1494 | emit_lslv (uint32_t *buf, struct aarch64_register rd, | |
1495 | struct aarch64_register rn, struct aarch64_register rm) | |
1496 | { | |
1497 | return emit_data_processing_reg (buf, LSLV, rd, rn, rm); | |
1498 | } | |
1499 | ||
1500 | /* Write a LSRV instruction into *BUF. | |
1501 | ||
1502 | LSRV rd, rn, rm | |
1503 | ||
1504 | RD is the destination register. | |
1505 | RN and RM are the source registers. */ | |
1506 | ||
1507 | static int | |
1508 | emit_lsrv (uint32_t *buf, struct aarch64_register rd, | |
1509 | struct aarch64_register rn, struct aarch64_register rm) | |
1510 | { | |
1511 | return emit_data_processing_reg (buf, LSRV, rd, rn, rm); | |
1512 | } | |
1513 | ||
1514 | /* Write a ASRV instruction into *BUF. | |
1515 | ||
1516 | ASRV rd, rn, rm | |
1517 | ||
1518 | RD is the destination register. | |
1519 | RN and RM are the source registers. */ | |
1520 | ||
1521 | static int | |
1522 | emit_asrv (uint32_t *buf, struct aarch64_register rd, | |
1523 | struct aarch64_register rn, struct aarch64_register rm) | |
1524 | { | |
1525 | return emit_data_processing_reg (buf, ASRV, rd, rn, rm); | |
1526 | } | |
1527 | ||
1528 | /* Write a MUL instruction into *BUF. | |
1529 | ||
1530 | MUL rd, rn, rm | |
1531 | ||
1532 | RD is the destination register. | |
1533 | RN and RM are the source registers. */ | |
1534 | ||
1535 | static int | |
1536 | emit_mul (uint32_t *buf, struct aarch64_register rd, | |
1537 | struct aarch64_register rn, struct aarch64_register rm) | |
1538 | { | |
1539 | return emit_data_processing_reg (buf, MUL, rd, rn, rm); | |
1540 | } | |
1541 | ||
bb903df0 PL |
1542 | /* Write a MRS instruction into *BUF. The register size is 64-bit. |
1543 | ||
1544 | MRS xt, system_reg | |
1545 | ||
1546 | RT is the destination register. | |
1547 | SYSTEM_REG is special purpose register to read. */ | |
1548 | ||
1549 | static int | |
1550 | emit_mrs (uint32_t *buf, struct aarch64_register rt, | |
1551 | enum aarch64_system_control_registers system_reg) | |
1552 | { | |
e1c587c3 YQ |
1553 | return aarch64_emit_insn (buf, MRS | ENCODE (system_reg, 15, 5) |
1554 | | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1555 | } |
1556 | ||
1557 | /* Write a MSR instruction into *BUF. The register size is 64-bit. | |
1558 | ||
1559 | MSR system_reg, xt | |
1560 | ||
1561 | SYSTEM_REG is special purpose register to write. | |
1562 | RT is the input register. */ | |
1563 | ||
1564 | static int | |
1565 | emit_msr (uint32_t *buf, enum aarch64_system_control_registers system_reg, | |
1566 | struct aarch64_register rt) | |
1567 | { | |
e1c587c3 YQ |
1568 | return aarch64_emit_insn (buf, MSR | ENCODE (system_reg, 15, 5) |
1569 | | ENCODE (rt.num, 5, 0)); | |
bb903df0 PL |
1570 | } |
1571 | ||
1572 | /* Write a SEVL instruction into *BUF. | |
1573 | ||
1574 | This is a hint instruction telling the hardware to trigger an event. */ | |
1575 | ||
1576 | static int | |
1577 | emit_sevl (uint32_t *buf) | |
1578 | { | |
e1c587c3 | 1579 | return aarch64_emit_insn (buf, SEVL); |
bb903df0 PL |
1580 | } |
1581 | ||
1582 | /* Write a WFE instruction into *BUF. | |
1583 | ||
1584 | This is a hint instruction telling the hardware to wait for an event. */ | |
1585 | ||
1586 | static int | |
1587 | emit_wfe (uint32_t *buf) | |
1588 | { | |
e1c587c3 | 1589 | return aarch64_emit_insn (buf, WFE); |
bb903df0 PL |
1590 | } |
1591 | ||
afbe19f8 PL |
1592 | /* Write a SBFM instruction into *BUF. |
1593 | ||
1594 | SBFM rd, rn, #immr, #imms | |
1595 | ||
1596 | This instruction moves the bits from #immr to #imms into the | |
1597 | destination, sign extending the result. | |
1598 | ||
1599 | RD is the destination register. | |
1600 | RN is the source register. | |
1601 | IMMR is the bit number to start at (least significant bit). | |
1602 | IMMS is the bit number to stop at (most significant bit). */ | |
1603 | ||
1604 | static int | |
1605 | emit_sbfm (uint32_t *buf, struct aarch64_register rd, | |
1606 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1607 | { | |
1608 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1609 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1610 | ||
e1c587c3 YQ |
1611 | return aarch64_emit_insn (buf, SBFM | size | n | ENCODE (immr, 6, 16) |
1612 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1613 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1614 | } |
1615 | ||
1616 | /* Write a SBFX instruction into *BUF. | |
1617 | ||
1618 | SBFX rd, rn, #lsb, #width | |
1619 | ||
1620 | This instruction moves #width bits from #lsb into the destination, sign | |
1621 | extending the result. This is an alias for: | |
1622 | ||
1623 | SBFM rd, rn, #lsb, #(lsb + width - 1) | |
1624 | ||
1625 | RD is the destination register. | |
1626 | RN is the source register. | |
1627 | LSB is the bit number to start at (least significant bit). | |
1628 | WIDTH is the number of bits to move. */ | |
1629 | ||
1630 | static int | |
1631 | emit_sbfx (uint32_t *buf, struct aarch64_register rd, | |
1632 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1633 | { | |
1634 | return emit_sbfm (buf, rd, rn, lsb, lsb + width - 1); | |
1635 | } | |
1636 | ||
1637 | /* Write a UBFM instruction into *BUF. | |
1638 | ||
1639 | UBFM rd, rn, #immr, #imms | |
1640 | ||
1641 | This instruction moves the bits from #immr to #imms into the | |
1642 | destination, extending the result with zeros. | |
1643 | ||
1644 | RD is the destination register. | |
1645 | RN is the source register. | |
1646 | IMMR is the bit number to start at (least significant bit). | |
1647 | IMMS is the bit number to stop at (most significant bit). */ | |
1648 | ||
1649 | static int | |
1650 | emit_ubfm (uint32_t *buf, struct aarch64_register rd, | |
1651 | struct aarch64_register rn, uint32_t immr, uint32_t imms) | |
1652 | { | |
1653 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1654 | uint32_t n = ENCODE (rd.is64, 1, 22); | |
1655 | ||
e1c587c3 YQ |
1656 | return aarch64_emit_insn (buf, UBFM | size | n | ENCODE (immr, 6, 16) |
1657 | | ENCODE (imms, 6, 10) | ENCODE (rn.num, 5, 5) | |
1658 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1659 | } |
1660 | ||
1661 | /* Write a UBFX instruction into *BUF. | |
1662 | ||
1663 | UBFX rd, rn, #lsb, #width | |
1664 | ||
1665 | This instruction moves #width bits from #lsb into the destination, | |
1666 | extending the result with zeros. This is an alias for: | |
1667 | ||
1668 | UBFM rd, rn, #lsb, #(lsb + width - 1) | |
1669 | ||
1670 | RD is the destination register. | |
1671 | RN is the source register. | |
1672 | LSB is the bit number to start at (least significant bit). | |
1673 | WIDTH is the number of bits to move. */ | |
1674 | ||
1675 | static int | |
1676 | emit_ubfx (uint32_t *buf, struct aarch64_register rd, | |
1677 | struct aarch64_register rn, uint32_t lsb, uint32_t width) | |
1678 | { | |
1679 | return emit_ubfm (buf, rd, rn, lsb, lsb + width - 1); | |
1680 | } | |
1681 | ||
1682 | /* Write a CSINC instruction into *BUF. | |
1683 | ||
1684 | CSINC rd, rn, rm, cond | |
1685 | ||
1686 | This instruction conditionally increments rn or rm and places the result | |
1687 | in rd. rn is chosen is the condition is true. | |
1688 | ||
1689 | RD is the destination register. | |
1690 | RN and RM are the source registers. | |
1691 | COND is the encoded condition. */ | |
1692 | ||
1693 | static int | |
1694 | emit_csinc (uint32_t *buf, struct aarch64_register rd, | |
1695 | struct aarch64_register rn, struct aarch64_register rm, | |
1696 | unsigned cond) | |
1697 | { | |
1698 | uint32_t size = ENCODE (rd.is64, 1, 31); | |
1699 | ||
e1c587c3 YQ |
1700 | return aarch64_emit_insn (buf, CSINC | size | ENCODE (rm.num, 5, 16) |
1701 | | ENCODE (cond, 4, 12) | ENCODE (rn.num, 5, 5) | |
1702 | | ENCODE (rd.num, 5, 0)); | |
afbe19f8 PL |
1703 | } |
1704 | ||
1705 | /* Write a CSET instruction into *BUF. | |
1706 | ||
1707 | CSET rd, cond | |
1708 | ||
1709 | This instruction conditionally write 1 or 0 in the destination register. | |
1710 | 1 is written if the condition is true. This is an alias for: | |
1711 | ||
1712 | CSINC rd, xzr, xzr, !cond | |
1713 | ||
1714 | Note that the condition needs to be inverted. | |
1715 | ||
1716 | RD is the destination register. | |
1717 | RN and RM are the source registers. | |
1718 | COND is the encoded condition. */ | |
1719 | ||
1720 | static int | |
1721 | emit_cset (uint32_t *buf, struct aarch64_register rd, unsigned cond) | |
1722 | { | |
1723 | /* The least significant bit of the condition needs toggling in order to | |
1724 | invert it. */ | |
1725 | return emit_csinc (buf, rd, xzr, xzr, cond ^ 0x1); | |
1726 | } | |
1727 | ||
bb903df0 PL |
1728 | /* Write LEN instructions from BUF into the inferior memory at *TO. |
1729 | ||
1730 | Note instructions are always little endian on AArch64, unlike data. */ | |
1731 | ||
1732 | static void | |
1733 | append_insns (CORE_ADDR *to, size_t len, const uint32_t *buf) | |
1734 | { | |
1735 | size_t byte_len = len * sizeof (uint32_t); | |
1736 | #if (__BYTE_ORDER == __BIG_ENDIAN) | |
cb93dc7f | 1737 | uint32_t *le_buf = (uint32_t *) xmalloc (byte_len); |
bb903df0 PL |
1738 | size_t i; |
1739 | ||
1740 | for (i = 0; i < len; i++) | |
1741 | le_buf[i] = htole32 (buf[i]); | |
1742 | ||
4196ab2a | 1743 | target_write_memory (*to, (const unsigned char *) le_buf, byte_len); |
bb903df0 PL |
1744 | |
1745 | xfree (le_buf); | |
1746 | #else | |
4196ab2a | 1747 | target_write_memory (*to, (const unsigned char *) buf, byte_len); |
bb903df0 PL |
1748 | #endif |
1749 | ||
1750 | *to += byte_len; | |
1751 | } | |
1752 | ||
0badd99f YQ |
1753 | /* Sub-class of struct aarch64_insn_data, store information of |
1754 | instruction relocation for fast tracepoint. Visitor can | |
1755 | relocate an instruction from BASE.INSN_ADDR to NEW_ADDR and save | |
1756 | the relocated instructions in buffer pointed by INSN_PTR. */ | |
bb903df0 | 1757 | |
0badd99f YQ |
1758 | struct aarch64_insn_relocation_data |
1759 | { | |
1760 | struct aarch64_insn_data base; | |
1761 | ||
1762 | /* The new address the instruction is relocated to. */ | |
1763 | CORE_ADDR new_addr; | |
1764 | /* Pointer to the buffer of relocated instruction(s). */ | |
1765 | uint32_t *insn_ptr; | |
1766 | }; | |
1767 | ||
1768 | /* Implementation of aarch64_insn_visitor method "b". */ | |
1769 | ||
1770 | static void | |
1771 | aarch64_ftrace_insn_reloc_b (const int is_bl, const int32_t offset, | |
1772 | struct aarch64_insn_data *data) | |
1773 | { | |
1774 | struct aarch64_insn_relocation_data *insn_reloc | |
1775 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1776 | int64_t new_offset |
0badd99f YQ |
1777 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1778 | ||
1779 | if (can_encode_int32 (new_offset, 28)) | |
1780 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, is_bl, new_offset); | |
1781 | } | |
1782 | ||
1783 | /* Implementation of aarch64_insn_visitor method "b_cond". */ | |
1784 | ||
1785 | static void | |
1786 | aarch64_ftrace_insn_reloc_b_cond (const unsigned cond, const int32_t offset, | |
1787 | struct aarch64_insn_data *data) | |
1788 | { | |
1789 | struct aarch64_insn_relocation_data *insn_reloc | |
1790 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1791 | int64_t new_offset |
0badd99f YQ |
1792 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1793 | ||
1794 | if (can_encode_int32 (new_offset, 21)) | |
1795 | { | |
1796 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, | |
1797 | new_offset); | |
bb903df0 | 1798 | } |
0badd99f | 1799 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1800 | { |
0badd99f YQ |
1801 | /* The offset is out of range for a conditional branch |
1802 | instruction but not for a unconditional branch. We can use | |
1803 | the following instructions instead: | |
bb903df0 | 1804 | |
0badd99f YQ |
1805 | B.COND TAKEN ; If cond is true, then jump to TAKEN. |
1806 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1807 | TAKEN: | |
1808 | B #(offset - 8) | |
1809 | NOT_TAKEN: | |
1810 | ||
1811 | */ | |
1812 | ||
1813 | insn_reloc->insn_ptr += emit_bcond (insn_reloc->insn_ptr, cond, 8); | |
1814 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1815 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
bb903df0 | 1816 | } |
0badd99f | 1817 | } |
bb903df0 | 1818 | |
0badd99f YQ |
1819 | /* Implementation of aarch64_insn_visitor method "cb". */ |
1820 | ||
1821 | static void | |
1822 | aarch64_ftrace_insn_reloc_cb (const int32_t offset, const int is_cbnz, | |
1823 | const unsigned rn, int is64, | |
1824 | struct aarch64_insn_data *data) | |
1825 | { | |
1826 | struct aarch64_insn_relocation_data *insn_reloc | |
1827 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1828 | int64_t new_offset |
0badd99f YQ |
1829 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1830 | ||
1831 | if (can_encode_int32 (new_offset, 21)) | |
1832 | { | |
1833 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1834 | aarch64_register (rn, is64), new_offset); | |
bb903df0 | 1835 | } |
0badd99f | 1836 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1837 | { |
0badd99f YQ |
1838 | /* The offset is out of range for a compare and branch |
1839 | instruction but not for a unconditional branch. We can use | |
1840 | the following instructions instead: | |
1841 | ||
1842 | CBZ xn, TAKEN ; xn == 0, then jump to TAKEN. | |
1843 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1844 | TAKEN: | |
1845 | B #(offset - 8) | |
1846 | NOT_TAKEN: | |
1847 | ||
1848 | */ | |
1849 | insn_reloc->insn_ptr += emit_cb (insn_reloc->insn_ptr, is_cbnz, | |
1850 | aarch64_register (rn, is64), 8); | |
1851 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1852 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, new_offset - 8); | |
1853 | } | |
1854 | } | |
bb903df0 | 1855 | |
0badd99f | 1856 | /* Implementation of aarch64_insn_visitor method "tb". */ |
bb903df0 | 1857 | |
0badd99f YQ |
1858 | static void |
1859 | aarch64_ftrace_insn_reloc_tb (const int32_t offset, int is_tbnz, | |
1860 | const unsigned rt, unsigned bit, | |
1861 | struct aarch64_insn_data *data) | |
1862 | { | |
1863 | struct aarch64_insn_relocation_data *insn_reloc | |
1864 | = (struct aarch64_insn_relocation_data *) data; | |
2ac09a5b | 1865 | int64_t new_offset |
0badd99f YQ |
1866 | = insn_reloc->base.insn_addr - insn_reloc->new_addr + offset; |
1867 | ||
1868 | if (can_encode_int32 (new_offset, 16)) | |
1869 | { | |
1870 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1871 | aarch64_register (rt, 1), new_offset); | |
bb903df0 | 1872 | } |
0badd99f | 1873 | else if (can_encode_int32 (new_offset, 28)) |
bb903df0 | 1874 | { |
0badd99f YQ |
1875 | /* The offset is out of range for a test bit and branch |
1876 | instruction but not for a unconditional branch. We can use | |
1877 | the following instructions instead: | |
1878 | ||
1879 | TBZ xn, #bit, TAKEN ; xn[bit] == 0, then jump to TAKEN. | |
1880 | B NOT_TAKEN ; Else jump over TAKEN and continue. | |
1881 | TAKEN: | |
1882 | B #(offset - 8) | |
1883 | NOT_TAKEN: | |
1884 | ||
1885 | */ | |
1886 | insn_reloc->insn_ptr += emit_tb (insn_reloc->insn_ptr, is_tbnz, bit, | |
1887 | aarch64_register (rt, 1), 8); | |
1888 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, 8); | |
1889 | insn_reloc->insn_ptr += emit_b (insn_reloc->insn_ptr, 0, | |
1890 | new_offset - 8); | |
1891 | } | |
1892 | } | |
bb903df0 | 1893 | |
0badd99f | 1894 | /* Implementation of aarch64_insn_visitor method "adr". */ |
bb903df0 | 1895 | |
0badd99f YQ |
1896 | static void |
1897 | aarch64_ftrace_insn_reloc_adr (const int32_t offset, const unsigned rd, | |
1898 | const int is_adrp, | |
1899 | struct aarch64_insn_data *data) | |
1900 | { | |
1901 | struct aarch64_insn_relocation_data *insn_reloc | |
1902 | = (struct aarch64_insn_relocation_data *) data; | |
1903 | /* We know exactly the address the ADR{P,} instruction will compute. | |
1904 | We can just write it to the destination register. */ | |
1905 | CORE_ADDR address = data->insn_addr + offset; | |
bb903df0 | 1906 | |
0badd99f YQ |
1907 | if (is_adrp) |
1908 | { | |
1909 | /* Clear the lower 12 bits of the offset to get the 4K page. */ | |
1910 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1911 | aarch64_register (rd, 1), | |
1912 | address & ~0xfff); | |
1913 | } | |
1914 | else | |
1915 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1916 | aarch64_register (rd, 1), address); | |
1917 | } | |
bb903df0 | 1918 | |
0badd99f | 1919 | /* Implementation of aarch64_insn_visitor method "ldr_literal". */ |
bb903df0 | 1920 | |
0badd99f YQ |
1921 | static void |
1922 | aarch64_ftrace_insn_reloc_ldr_literal (const int32_t offset, const int is_sw, | |
1923 | const unsigned rt, const int is64, | |
1924 | struct aarch64_insn_data *data) | |
1925 | { | |
1926 | struct aarch64_insn_relocation_data *insn_reloc | |
1927 | = (struct aarch64_insn_relocation_data *) data; | |
1928 | CORE_ADDR address = data->insn_addr + offset; | |
1929 | ||
1930 | insn_reloc->insn_ptr += emit_mov_addr (insn_reloc->insn_ptr, | |
1931 | aarch64_register (rt, 1), address); | |
1932 | ||
1933 | /* We know exactly what address to load from, and what register we | |
1934 | can use: | |
1935 | ||
1936 | MOV xd, #(oldloc + offset) | |
1937 | MOVK xd, #((oldloc + offset) >> 16), lsl #16 | |
1938 | ... | |
1939 | ||
1940 | LDR xd, [xd] ; or LDRSW xd, [xd] | |
1941 | ||
1942 | */ | |
1943 | ||
1944 | if (is_sw) | |
1945 | insn_reloc->insn_ptr += emit_ldrsw (insn_reloc->insn_ptr, | |
1946 | aarch64_register (rt, 1), | |
1947 | aarch64_register (rt, 1), | |
1948 | offset_memory_operand (0)); | |
bb903df0 | 1949 | else |
0badd99f YQ |
1950 | insn_reloc->insn_ptr += emit_ldr (insn_reloc->insn_ptr, |
1951 | aarch64_register (rt, is64), | |
1952 | aarch64_register (rt, 1), | |
1953 | offset_memory_operand (0)); | |
1954 | } | |
1955 | ||
1956 | /* Implementation of aarch64_insn_visitor method "others". */ | |
1957 | ||
1958 | static void | |
1959 | aarch64_ftrace_insn_reloc_others (const uint32_t insn, | |
1960 | struct aarch64_insn_data *data) | |
1961 | { | |
1962 | struct aarch64_insn_relocation_data *insn_reloc | |
1963 | = (struct aarch64_insn_relocation_data *) data; | |
bb903df0 | 1964 | |
0badd99f YQ |
1965 | /* The instruction is not PC relative. Just re-emit it at the new |
1966 | location. */ | |
e1c587c3 | 1967 | insn_reloc->insn_ptr += aarch64_emit_insn (insn_reloc->insn_ptr, insn); |
0badd99f YQ |
1968 | } |
1969 | ||
1970 | static const struct aarch64_insn_visitor visitor = | |
1971 | { | |
1972 | aarch64_ftrace_insn_reloc_b, | |
1973 | aarch64_ftrace_insn_reloc_b_cond, | |
1974 | aarch64_ftrace_insn_reloc_cb, | |
1975 | aarch64_ftrace_insn_reloc_tb, | |
1976 | aarch64_ftrace_insn_reloc_adr, | |
1977 | aarch64_ftrace_insn_reloc_ldr_literal, | |
1978 | aarch64_ftrace_insn_reloc_others, | |
1979 | }; | |
1980 | ||
809a0c35 TBA |
1981 | bool |
1982 | aarch64_target::supports_fast_tracepoints () | |
1983 | { | |
1984 | return true; | |
1985 | } | |
1986 | ||
1987 | /* Implementation of target ops method | |
bb903df0 PL |
1988 | "install_fast_tracepoint_jump_pad". */ |
1989 | ||
809a0c35 TBA |
1990 | int |
1991 | aarch64_target::install_fast_tracepoint_jump_pad | |
1992 | (CORE_ADDR tpoint, CORE_ADDR tpaddr, CORE_ADDR collector, | |
1993 | CORE_ADDR lockaddr, ULONGEST orig_size, CORE_ADDR *jump_entry, | |
1994 | CORE_ADDR *trampoline, ULONGEST *trampoline_size, | |
1995 | unsigned char *jjump_pad_insn, ULONGEST *jjump_pad_insn_size, | |
1996 | CORE_ADDR *adjusted_insn_addr, CORE_ADDR *adjusted_insn_addr_end, | |
1997 | char *err) | |
bb903df0 PL |
1998 | { |
1999 | uint32_t buf[256]; | |
2000 | uint32_t *p = buf; | |
2ac09a5b | 2001 | int64_t offset; |
bb903df0 | 2002 | int i; |
70b439f0 | 2003 | uint32_t insn; |
bb903df0 | 2004 | CORE_ADDR buildaddr = *jump_entry; |
0badd99f | 2005 | struct aarch64_insn_relocation_data insn_data; |
bb903df0 PL |
2006 | |
2007 | /* We need to save the current state on the stack both to restore it | |
2008 | later and to collect register values when the tracepoint is hit. | |
2009 | ||
2010 | The saved registers are pushed in a layout that needs to be in sync | |
2011 | with aarch64_ft_collect_regmap (see linux-aarch64-ipa.c). Later on | |
2012 | the supply_fast_tracepoint_registers function will fill in the | |
2013 | register cache from a pointer to saved registers on the stack we build | |
2014 | here. | |
2015 | ||
2016 | For simplicity, we set the size of each cell on the stack to 16 bytes. | |
2017 | This way one cell can hold any register type, from system registers | |
2018 | to the 128 bit SIMD&FP registers. Furthermore, the stack pointer | |
2019 | has to be 16 bytes aligned anyway. | |
2020 | ||
2021 | Note that the CPSR register does not exist on AArch64. Instead we | |
2022 | can access system bits describing the process state with the | |
2023 | MRS/MSR instructions, namely the condition flags. We save them as | |
2024 | if they are part of a CPSR register because that's how GDB | |
2025 | interprets these system bits. At the moment, only the condition | |
2026 | flags are saved in CPSR (NZCV). | |
2027 | ||
2028 | Stack layout, each cell is 16 bytes (descending): | |
2029 | ||
2030 | High *-------- SIMD&FP registers from 31 down to 0. --------* | |
2031 | | q31 | | |
2032 | . . | |
2033 | . . 32 cells | |
2034 | . . | |
2035 | | q0 | | |
2036 | *---- General purpose registers from 30 down to 0. ----* | |
2037 | | x30 | | |
2038 | . . | |
2039 | . . 31 cells | |
2040 | . . | |
2041 | | x0 | | |
2042 | *------------- Special purpose registers. -------------* | |
2043 | | SP | | |
2044 | | PC | | |
2045 | | CPSR (NZCV) | 5 cells | |
2046 | | FPSR | | |
2047 | | FPCR | <- SP + 16 | |
2048 | *------------- collecting_t object --------------------* | |
2049 | | TPIDR_EL0 | struct tracepoint * | | |
2050 | Low *------------------------------------------------------* | |
2051 | ||
2052 | After this stack is set up, we issue a call to the collector, passing | |
2053 | it the saved registers at (SP + 16). */ | |
2054 | ||
2055 | /* Push SIMD&FP registers on the stack: | |
2056 | ||
2057 | SUB sp, sp, #(32 * 16) | |
2058 | ||
2059 | STP q30, q31, [sp, #(30 * 16)] | |
2060 | ... | |
2061 | STP q0, q1, [sp] | |
2062 | ||
2063 | */ | |
2064 | p += emit_sub (p, sp, sp, immediate_operand (32 * 16)); | |
2065 | for (i = 30; i >= 0; i -= 2) | |
2066 | p += emit_stp_q_offset (p, i, i + 1, sp, i * 16); | |
2067 | ||
30baf67b | 2068 | /* Push general purpose registers on the stack. Note that we do not need |
bb903df0 PL |
2069 | to push x31 as it represents the xzr register and not the stack |
2070 | pointer in a STR instruction. | |
2071 | ||
2072 | SUB sp, sp, #(31 * 16) | |
2073 | ||
2074 | STR x30, [sp, #(30 * 16)] | |
2075 | ... | |
2076 | STR x0, [sp] | |
2077 | ||
2078 | */ | |
2079 | p += emit_sub (p, sp, sp, immediate_operand (31 * 16)); | |
2080 | for (i = 30; i >= 0; i -= 1) | |
2081 | p += emit_str (p, aarch64_register (i, 1), sp, | |
2082 | offset_memory_operand (i * 16)); | |
2083 | ||
2084 | /* Make space for 5 more cells. | |
2085 | ||
2086 | SUB sp, sp, #(5 * 16) | |
2087 | ||
2088 | */ | |
2089 | p += emit_sub (p, sp, sp, immediate_operand (5 * 16)); | |
2090 | ||
2091 | ||
2092 | /* Save SP: | |
2093 | ||
2094 | ADD x4, sp, #((32 + 31 + 5) * 16) | |
2095 | STR x4, [sp, #(4 * 16)] | |
2096 | ||
2097 | */ | |
2098 | p += emit_add (p, x4, sp, immediate_operand ((32 + 31 + 5) * 16)); | |
2099 | p += emit_str (p, x4, sp, offset_memory_operand (4 * 16)); | |
2100 | ||
2101 | /* Save PC (tracepoint address): | |
2102 | ||
2103 | MOV x3, #(tpaddr) | |
2104 | ... | |
2105 | ||
2106 | STR x3, [sp, #(3 * 16)] | |
2107 | ||
2108 | */ | |
2109 | ||
2110 | p += emit_mov_addr (p, x3, tpaddr); | |
2111 | p += emit_str (p, x3, sp, offset_memory_operand (3 * 16)); | |
2112 | ||
2113 | /* Save CPSR (NZCV), FPSR and FPCR: | |
2114 | ||
2115 | MRS x2, nzcv | |
2116 | MRS x1, fpsr | |
2117 | MRS x0, fpcr | |
2118 | ||
2119 | STR x2, [sp, #(2 * 16)] | |
2120 | STR x1, [sp, #(1 * 16)] | |
2121 | STR x0, [sp, #(0 * 16)] | |
2122 | ||
2123 | */ | |
2124 | p += emit_mrs (p, x2, NZCV); | |
2125 | p += emit_mrs (p, x1, FPSR); | |
2126 | p += emit_mrs (p, x0, FPCR); | |
2127 | p += emit_str (p, x2, sp, offset_memory_operand (2 * 16)); | |
2128 | p += emit_str (p, x1, sp, offset_memory_operand (1 * 16)); | |
2129 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2130 | ||
2131 | /* Push the collecting_t object. It consist of the address of the | |
2132 | tracepoint and an ID for the current thread. We get the latter by | |
2133 | reading the tpidr_el0 system register. It corresponds to the | |
2134 | NT_ARM_TLS register accessible with ptrace. | |
2135 | ||
2136 | MOV x0, #(tpoint) | |
2137 | ... | |
2138 | ||
2139 | MRS x1, tpidr_el0 | |
2140 | ||
2141 | STP x0, x1, [sp, #-16]! | |
2142 | ||
2143 | */ | |
2144 | ||
2145 | p += emit_mov_addr (p, x0, tpoint); | |
2146 | p += emit_mrs (p, x1, TPIDR_EL0); | |
2147 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-16)); | |
2148 | ||
2149 | /* Spin-lock: | |
2150 | ||
2151 | The shared memory for the lock is at lockaddr. It will hold zero | |
2152 | if no-one is holding the lock, otherwise it contains the address of | |
2153 | the collecting_t object on the stack of the thread which acquired it. | |
2154 | ||
2155 | At this stage, the stack pointer points to this thread's collecting_t | |
2156 | object. | |
2157 | ||
2158 | We use the following registers: | |
2159 | - x0: Address of the lock. | |
2160 | - x1: Pointer to collecting_t object. | |
2161 | - x2: Scratch register. | |
2162 | ||
2163 | MOV x0, #(lockaddr) | |
2164 | ... | |
2165 | MOV x1, sp | |
2166 | ||
2167 | ; Trigger an event local to this core. So the following WFE | |
2168 | ; instruction is ignored. | |
2169 | SEVL | |
2170 | again: | |
2171 | ; Wait for an event. The event is triggered by either the SEVL | |
2172 | ; or STLR instructions (store release). | |
2173 | WFE | |
2174 | ||
2175 | ; Atomically read at lockaddr. This marks the memory location as | |
2176 | ; exclusive. This instruction also has memory constraints which | |
2177 | ; make sure all previous data reads and writes are done before | |
2178 | ; executing it. | |
2179 | LDAXR x2, [x0] | |
2180 | ||
2181 | ; Try again if another thread holds the lock. | |
2182 | CBNZ x2, again | |
2183 | ||
2184 | ; We can lock it! Write the address of the collecting_t object. | |
2185 | ; This instruction will fail if the memory location is not marked | |
2186 | ; as exclusive anymore. If it succeeds, it will remove the | |
2187 | ; exclusive mark on the memory location. This way, if another | |
2188 | ; thread executes this instruction before us, we will fail and try | |
2189 | ; all over again. | |
2190 | STXR w2, x1, [x0] | |
2191 | CBNZ w2, again | |
2192 | ||
2193 | */ | |
2194 | ||
2195 | p += emit_mov_addr (p, x0, lockaddr); | |
2196 | p += emit_mov (p, x1, register_operand (sp)); | |
2197 | ||
2198 | p += emit_sevl (p); | |
2199 | p += emit_wfe (p); | |
2200 | p += emit_ldaxr (p, x2, x0); | |
2201 | p += emit_cb (p, 1, w2, -2 * 4); | |
2202 | p += emit_stxr (p, w2, x1, x0); | |
2203 | p += emit_cb (p, 1, x2, -4 * 4); | |
2204 | ||
2205 | /* Call collector (struct tracepoint *, unsigned char *): | |
2206 | ||
2207 | MOV x0, #(tpoint) | |
2208 | ... | |
2209 | ||
2210 | ; Saved registers start after the collecting_t object. | |
2211 | ADD x1, sp, #16 | |
2212 | ||
2213 | ; We use an intra-procedure-call scratch register. | |
2214 | MOV ip0, #(collector) | |
2215 | ... | |
2216 | ||
2217 | ; And call back to C! | |
2218 | BLR ip0 | |
2219 | ||
2220 | */ | |
2221 | ||
2222 | p += emit_mov_addr (p, x0, tpoint); | |
2223 | p += emit_add (p, x1, sp, immediate_operand (16)); | |
2224 | ||
2225 | p += emit_mov_addr (p, ip0, collector); | |
2226 | p += emit_blr (p, ip0); | |
2227 | ||
2228 | /* Release the lock. | |
2229 | ||
2230 | MOV x0, #(lockaddr) | |
2231 | ... | |
2232 | ||
2233 | ; This instruction is a normal store with memory ordering | |
2234 | ; constraints. Thanks to this we do not have to put a data | |
2235 | ; barrier instruction to make sure all data read and writes are done | |
30baf67b | 2236 | ; before this instruction is executed. Furthermore, this instruction |
bb903df0 PL |
2237 | ; will trigger an event, letting other threads know they can grab |
2238 | ; the lock. | |
2239 | STLR xzr, [x0] | |
2240 | ||
2241 | */ | |
2242 | p += emit_mov_addr (p, x0, lockaddr); | |
2243 | p += emit_stlr (p, xzr, x0); | |
2244 | ||
2245 | /* Free collecting_t object: | |
2246 | ||
2247 | ADD sp, sp, #16 | |
2248 | ||
2249 | */ | |
2250 | p += emit_add (p, sp, sp, immediate_operand (16)); | |
2251 | ||
2252 | /* Restore CPSR (NZCV), FPSR and FPCR. And free all special purpose | |
2253 | registers from the stack. | |
2254 | ||
2255 | LDR x2, [sp, #(2 * 16)] | |
2256 | LDR x1, [sp, #(1 * 16)] | |
2257 | LDR x0, [sp, #(0 * 16)] | |
2258 | ||
2259 | MSR NZCV, x2 | |
2260 | MSR FPSR, x1 | |
2261 | MSR FPCR, x0 | |
2262 | ||
2263 | ADD sp, sp #(5 * 16) | |
2264 | ||
2265 | */ | |
2266 | p += emit_ldr (p, x2, sp, offset_memory_operand (2 * 16)); | |
2267 | p += emit_ldr (p, x1, sp, offset_memory_operand (1 * 16)); | |
2268 | p += emit_ldr (p, x0, sp, offset_memory_operand (0 * 16)); | |
2269 | p += emit_msr (p, NZCV, x2); | |
2270 | p += emit_msr (p, FPSR, x1); | |
2271 | p += emit_msr (p, FPCR, x0); | |
2272 | ||
2273 | p += emit_add (p, sp, sp, immediate_operand (5 * 16)); | |
2274 | ||
2275 | /* Pop general purpose registers: | |
2276 | ||
2277 | LDR x0, [sp] | |
2278 | ... | |
2279 | LDR x30, [sp, #(30 * 16)] | |
2280 | ||
2281 | ADD sp, sp, #(31 * 16) | |
2282 | ||
2283 | */ | |
2284 | for (i = 0; i <= 30; i += 1) | |
2285 | p += emit_ldr (p, aarch64_register (i, 1), sp, | |
2286 | offset_memory_operand (i * 16)); | |
2287 | p += emit_add (p, sp, sp, immediate_operand (31 * 16)); | |
2288 | ||
2289 | /* Pop SIMD&FP registers: | |
2290 | ||
2291 | LDP q0, q1, [sp] | |
2292 | ... | |
2293 | LDP q30, q31, [sp, #(30 * 16)] | |
2294 | ||
2295 | ADD sp, sp, #(32 * 16) | |
2296 | ||
2297 | */ | |
2298 | for (i = 0; i <= 30; i += 2) | |
2299 | p += emit_ldp_q_offset (p, i, i + 1, sp, i * 16); | |
2300 | p += emit_add (p, sp, sp, immediate_operand (32 * 16)); | |
2301 | ||
2302 | /* Write the code into the inferior memory. */ | |
2303 | append_insns (&buildaddr, p - buf, buf); | |
2304 | ||
2305 | /* Now emit the relocated instruction. */ | |
2306 | *adjusted_insn_addr = buildaddr; | |
70b439f0 | 2307 | target_read_uint32 (tpaddr, &insn); |
0badd99f YQ |
2308 | |
2309 | insn_data.base.insn_addr = tpaddr; | |
2310 | insn_data.new_addr = buildaddr; | |
2311 | insn_data.insn_ptr = buf; | |
2312 | ||
2313 | aarch64_relocate_instruction (insn, &visitor, | |
2314 | (struct aarch64_insn_data *) &insn_data); | |
2315 | ||
bb903df0 | 2316 | /* We may not have been able to relocate the instruction. */ |
0badd99f | 2317 | if (insn_data.insn_ptr == buf) |
bb903df0 PL |
2318 | { |
2319 | sprintf (err, | |
2320 | "E.Could not relocate instruction from %s to %s.", | |
2321 | core_addr_to_string_nz (tpaddr), | |
2322 | core_addr_to_string_nz (buildaddr)); | |
2323 | return 1; | |
2324 | } | |
dfaffe9d | 2325 | else |
0badd99f | 2326 | append_insns (&buildaddr, insn_data.insn_ptr - buf, buf); |
dfaffe9d | 2327 | *adjusted_insn_addr_end = buildaddr; |
bb903df0 PL |
2328 | |
2329 | /* Go back to the start of the buffer. */ | |
2330 | p = buf; | |
2331 | ||
2332 | /* Emit a branch back from the jump pad. */ | |
2333 | offset = (tpaddr + orig_size - buildaddr); | |
2334 | if (!can_encode_int32 (offset, 28)) | |
2335 | { | |
2336 | sprintf (err, | |
2337 | "E.Jump back from jump pad too far from tracepoint " | |
2ac09a5b | 2338 | "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).", |
bb903df0 PL |
2339 | offset); |
2340 | return 1; | |
2341 | } | |
2342 | ||
2343 | p += emit_b (p, 0, offset); | |
2344 | append_insns (&buildaddr, p - buf, buf); | |
2345 | ||
2346 | /* Give the caller a branch instruction into the jump pad. */ | |
2347 | offset = (*jump_entry - tpaddr); | |
2348 | if (!can_encode_int32 (offset, 28)) | |
2349 | { | |
2350 | sprintf (err, | |
2351 | "E.Jump pad too far from tracepoint " | |
2ac09a5b | 2352 | "(offset 0x%" PRIx64 " cannot be encoded in 28 bits).", |
bb903df0 PL |
2353 | offset); |
2354 | return 1; | |
2355 | } | |
2356 | ||
2357 | emit_b ((uint32_t *) jjump_pad_insn, 0, offset); | |
2358 | *jjump_pad_insn_size = 4; | |
2359 | ||
2360 | /* Return the end address of our pad. */ | |
2361 | *jump_entry = buildaddr; | |
2362 | ||
2363 | return 0; | |
2364 | } | |
2365 | ||
afbe19f8 PL |
2366 | /* Helper function writing LEN instructions from START into |
2367 | current_insn_ptr. */ | |
2368 | ||
2369 | static void | |
2370 | emit_ops_insns (const uint32_t *start, int len) | |
2371 | { | |
2372 | CORE_ADDR buildaddr = current_insn_ptr; | |
2373 | ||
2374 | if (debug_threads) | |
2375 | debug_printf ("Adding %d instrucions at %s\n", | |
2376 | len, paddress (buildaddr)); | |
2377 | ||
2378 | append_insns (&buildaddr, len, start); | |
2379 | current_insn_ptr = buildaddr; | |
2380 | } | |
2381 | ||
2382 | /* Pop a register from the stack. */ | |
2383 | ||
2384 | static int | |
2385 | emit_pop (uint32_t *buf, struct aarch64_register rt) | |
2386 | { | |
2387 | return emit_ldr (buf, rt, sp, postindex_memory_operand (1 * 16)); | |
2388 | } | |
2389 | ||
2390 | /* Push a register on the stack. */ | |
2391 | ||
2392 | static int | |
2393 | emit_push (uint32_t *buf, struct aarch64_register rt) | |
2394 | { | |
2395 | return emit_str (buf, rt, sp, preindex_memory_operand (-1 * 16)); | |
2396 | } | |
2397 | ||
2398 | /* Implementation of emit_ops method "emit_prologue". */ | |
2399 | ||
2400 | static void | |
2401 | aarch64_emit_prologue (void) | |
2402 | { | |
2403 | uint32_t buf[16]; | |
2404 | uint32_t *p = buf; | |
2405 | ||
2406 | /* This function emit a prologue for the following function prototype: | |
2407 | ||
2408 | enum eval_result_type f (unsigned char *regs, | |
2409 | ULONGEST *value); | |
2410 | ||
2411 | The first argument is a buffer of raw registers. The second | |
2412 | argument is the result of | |
2413 | evaluating the expression, which will be set to whatever is on top of | |
2414 | the stack at the end. | |
2415 | ||
2416 | The stack set up by the prologue is as such: | |
2417 | ||
2418 | High *------------------------------------------------------* | |
2419 | | LR | | |
2420 | | FP | <- FP | |
2421 | | x1 (ULONGEST *value) | | |
2422 | | x0 (unsigned char *regs) | | |
2423 | Low *------------------------------------------------------* | |
2424 | ||
2425 | As we are implementing a stack machine, each opcode can expand the | |
2426 | stack so we never know how far we are from the data saved by this | |
2427 | prologue. In order to be able refer to value and regs later, we save | |
2428 | the current stack pointer in the frame pointer. This way, it is not | |
2429 | clobbered when calling C functions. | |
2430 | ||
30baf67b | 2431 | Finally, throughout every operation, we are using register x0 as the |
afbe19f8 PL |
2432 | top of the stack, and x1 as a scratch register. */ |
2433 | ||
2434 | p += emit_stp (p, x0, x1, sp, preindex_memory_operand (-2 * 16)); | |
2435 | p += emit_str (p, lr, sp, offset_memory_operand (3 * 8)); | |
2436 | p += emit_str (p, fp, sp, offset_memory_operand (2 * 8)); | |
2437 | ||
2438 | p += emit_add (p, fp, sp, immediate_operand (2 * 8)); | |
2439 | ||
2440 | ||
2441 | emit_ops_insns (buf, p - buf); | |
2442 | } | |
2443 | ||
2444 | /* Implementation of emit_ops method "emit_epilogue". */ | |
2445 | ||
2446 | static void | |
2447 | aarch64_emit_epilogue (void) | |
2448 | { | |
2449 | uint32_t buf[16]; | |
2450 | uint32_t *p = buf; | |
2451 | ||
2452 | /* Store the result of the expression (x0) in *value. */ | |
2453 | p += emit_sub (p, x1, fp, immediate_operand (1 * 8)); | |
2454 | p += emit_ldr (p, x1, x1, offset_memory_operand (0)); | |
2455 | p += emit_str (p, x0, x1, offset_memory_operand (0)); | |
2456 | ||
2457 | /* Restore the previous state. */ | |
2458 | p += emit_add (p, sp, fp, immediate_operand (2 * 8)); | |
2459 | p += emit_ldp (p, fp, lr, fp, offset_memory_operand (0)); | |
2460 | ||
2461 | /* Return expr_eval_no_error. */ | |
2462 | p += emit_mov (p, x0, immediate_operand (expr_eval_no_error)); | |
2463 | p += emit_ret (p, lr); | |
2464 | ||
2465 | emit_ops_insns (buf, p - buf); | |
2466 | } | |
2467 | ||
2468 | /* Implementation of emit_ops method "emit_add". */ | |
2469 | ||
2470 | static void | |
2471 | aarch64_emit_add (void) | |
2472 | { | |
2473 | uint32_t buf[16]; | |
2474 | uint32_t *p = buf; | |
2475 | ||
2476 | p += emit_pop (p, x1); | |
45e3745e | 2477 | p += emit_add (p, x0, x1, register_operand (x0)); |
afbe19f8 PL |
2478 | |
2479 | emit_ops_insns (buf, p - buf); | |
2480 | } | |
2481 | ||
2482 | /* Implementation of emit_ops method "emit_sub". */ | |
2483 | ||
2484 | static void | |
2485 | aarch64_emit_sub (void) | |
2486 | { | |
2487 | uint32_t buf[16]; | |
2488 | uint32_t *p = buf; | |
2489 | ||
2490 | p += emit_pop (p, x1); | |
45e3745e | 2491 | p += emit_sub (p, x0, x1, register_operand (x0)); |
afbe19f8 PL |
2492 | |
2493 | emit_ops_insns (buf, p - buf); | |
2494 | } | |
2495 | ||
2496 | /* Implementation of emit_ops method "emit_mul". */ | |
2497 | ||
2498 | static void | |
2499 | aarch64_emit_mul (void) | |
2500 | { | |
2501 | uint32_t buf[16]; | |
2502 | uint32_t *p = buf; | |
2503 | ||
2504 | p += emit_pop (p, x1); | |
2505 | p += emit_mul (p, x0, x1, x0); | |
2506 | ||
2507 | emit_ops_insns (buf, p - buf); | |
2508 | } | |
2509 | ||
2510 | /* Implementation of emit_ops method "emit_lsh". */ | |
2511 | ||
2512 | static void | |
2513 | aarch64_emit_lsh (void) | |
2514 | { | |
2515 | uint32_t buf[16]; | |
2516 | uint32_t *p = buf; | |
2517 | ||
2518 | p += emit_pop (p, x1); | |
2519 | p += emit_lslv (p, x0, x1, x0); | |
2520 | ||
2521 | emit_ops_insns (buf, p - buf); | |
2522 | } | |
2523 | ||
2524 | /* Implementation of emit_ops method "emit_rsh_signed". */ | |
2525 | ||
2526 | static void | |
2527 | aarch64_emit_rsh_signed (void) | |
2528 | { | |
2529 | uint32_t buf[16]; | |
2530 | uint32_t *p = buf; | |
2531 | ||
2532 | p += emit_pop (p, x1); | |
2533 | p += emit_asrv (p, x0, x1, x0); | |
2534 | ||
2535 | emit_ops_insns (buf, p - buf); | |
2536 | } | |
2537 | ||
2538 | /* Implementation of emit_ops method "emit_rsh_unsigned". */ | |
2539 | ||
2540 | static void | |
2541 | aarch64_emit_rsh_unsigned (void) | |
2542 | { | |
2543 | uint32_t buf[16]; | |
2544 | uint32_t *p = buf; | |
2545 | ||
2546 | p += emit_pop (p, x1); | |
2547 | p += emit_lsrv (p, x0, x1, x0); | |
2548 | ||
2549 | emit_ops_insns (buf, p - buf); | |
2550 | } | |
2551 | ||
2552 | /* Implementation of emit_ops method "emit_ext". */ | |
2553 | ||
2554 | static void | |
2555 | aarch64_emit_ext (int arg) | |
2556 | { | |
2557 | uint32_t buf[16]; | |
2558 | uint32_t *p = buf; | |
2559 | ||
2560 | p += emit_sbfx (p, x0, x0, 0, arg); | |
2561 | ||
2562 | emit_ops_insns (buf, p - buf); | |
2563 | } | |
2564 | ||
2565 | /* Implementation of emit_ops method "emit_log_not". */ | |
2566 | ||
2567 | static void | |
2568 | aarch64_emit_log_not (void) | |
2569 | { | |
2570 | uint32_t buf[16]; | |
2571 | uint32_t *p = buf; | |
2572 | ||
2573 | /* If the top of the stack is 0, replace it with 1. Else replace it with | |
2574 | 0. */ | |
2575 | ||
2576 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2577 | p += emit_cset (p, x0, EQ); | |
2578 | ||
2579 | emit_ops_insns (buf, p - buf); | |
2580 | } | |
2581 | ||
2582 | /* Implementation of emit_ops method "emit_bit_and". */ | |
2583 | ||
2584 | static void | |
2585 | aarch64_emit_bit_and (void) | |
2586 | { | |
2587 | uint32_t buf[16]; | |
2588 | uint32_t *p = buf; | |
2589 | ||
2590 | p += emit_pop (p, x1); | |
2591 | p += emit_and (p, x0, x0, x1); | |
2592 | ||
2593 | emit_ops_insns (buf, p - buf); | |
2594 | } | |
2595 | ||
2596 | /* Implementation of emit_ops method "emit_bit_or". */ | |
2597 | ||
2598 | static void | |
2599 | aarch64_emit_bit_or (void) | |
2600 | { | |
2601 | uint32_t buf[16]; | |
2602 | uint32_t *p = buf; | |
2603 | ||
2604 | p += emit_pop (p, x1); | |
2605 | p += emit_orr (p, x0, x0, x1); | |
2606 | ||
2607 | emit_ops_insns (buf, p - buf); | |
2608 | } | |
2609 | ||
2610 | /* Implementation of emit_ops method "emit_bit_xor". */ | |
2611 | ||
2612 | static void | |
2613 | aarch64_emit_bit_xor (void) | |
2614 | { | |
2615 | uint32_t buf[16]; | |
2616 | uint32_t *p = buf; | |
2617 | ||
2618 | p += emit_pop (p, x1); | |
2619 | p += emit_eor (p, x0, x0, x1); | |
2620 | ||
2621 | emit_ops_insns (buf, p - buf); | |
2622 | } | |
2623 | ||
2624 | /* Implementation of emit_ops method "emit_bit_not". */ | |
2625 | ||
2626 | static void | |
2627 | aarch64_emit_bit_not (void) | |
2628 | { | |
2629 | uint32_t buf[16]; | |
2630 | uint32_t *p = buf; | |
2631 | ||
2632 | p += emit_mvn (p, x0, x0); | |
2633 | ||
2634 | emit_ops_insns (buf, p - buf); | |
2635 | } | |
2636 | ||
2637 | /* Implementation of emit_ops method "emit_equal". */ | |
2638 | ||
2639 | static void | |
2640 | aarch64_emit_equal (void) | |
2641 | { | |
2642 | uint32_t buf[16]; | |
2643 | uint32_t *p = buf; | |
2644 | ||
2645 | p += emit_pop (p, x1); | |
2646 | p += emit_cmp (p, x0, register_operand (x1)); | |
2647 | p += emit_cset (p, x0, EQ); | |
2648 | ||
2649 | emit_ops_insns (buf, p - buf); | |
2650 | } | |
2651 | ||
2652 | /* Implementation of emit_ops method "emit_less_signed". */ | |
2653 | ||
2654 | static void | |
2655 | aarch64_emit_less_signed (void) | |
2656 | { | |
2657 | uint32_t buf[16]; | |
2658 | uint32_t *p = buf; | |
2659 | ||
2660 | p += emit_pop (p, x1); | |
2661 | p += emit_cmp (p, x1, register_operand (x0)); | |
2662 | p += emit_cset (p, x0, LT); | |
2663 | ||
2664 | emit_ops_insns (buf, p - buf); | |
2665 | } | |
2666 | ||
2667 | /* Implementation of emit_ops method "emit_less_unsigned". */ | |
2668 | ||
2669 | static void | |
2670 | aarch64_emit_less_unsigned (void) | |
2671 | { | |
2672 | uint32_t buf[16]; | |
2673 | uint32_t *p = buf; | |
2674 | ||
2675 | p += emit_pop (p, x1); | |
2676 | p += emit_cmp (p, x1, register_operand (x0)); | |
2677 | p += emit_cset (p, x0, LO); | |
2678 | ||
2679 | emit_ops_insns (buf, p - buf); | |
2680 | } | |
2681 | ||
2682 | /* Implementation of emit_ops method "emit_ref". */ | |
2683 | ||
2684 | static void | |
2685 | aarch64_emit_ref (int size) | |
2686 | { | |
2687 | uint32_t buf[16]; | |
2688 | uint32_t *p = buf; | |
2689 | ||
2690 | switch (size) | |
2691 | { | |
2692 | case 1: | |
2693 | p += emit_ldrb (p, w0, x0, offset_memory_operand (0)); | |
2694 | break; | |
2695 | case 2: | |
2696 | p += emit_ldrh (p, w0, x0, offset_memory_operand (0)); | |
2697 | break; | |
2698 | case 4: | |
2699 | p += emit_ldr (p, w0, x0, offset_memory_operand (0)); | |
2700 | break; | |
2701 | case 8: | |
2702 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2703 | break; | |
2704 | default: | |
2705 | /* Unknown size, bail on compilation. */ | |
2706 | emit_error = 1; | |
2707 | break; | |
2708 | } | |
2709 | ||
2710 | emit_ops_insns (buf, p - buf); | |
2711 | } | |
2712 | ||
2713 | /* Implementation of emit_ops method "emit_if_goto". */ | |
2714 | ||
2715 | static void | |
2716 | aarch64_emit_if_goto (int *offset_p, int *size_p) | |
2717 | { | |
2718 | uint32_t buf[16]; | |
2719 | uint32_t *p = buf; | |
2720 | ||
2721 | /* The Z flag is set or cleared here. */ | |
2722 | p += emit_cmp (p, x0, immediate_operand (0)); | |
2723 | /* This instruction must not change the Z flag. */ | |
2724 | p += emit_pop (p, x0); | |
2725 | /* Branch over the next instruction if x0 == 0. */ | |
2726 | p += emit_bcond (p, EQ, 8); | |
2727 | ||
2728 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2729 | if (offset_p) | |
2730 | *offset_p = (p - buf) * 4; | |
2731 | if (size_p) | |
2732 | *size_p = 4; | |
2733 | p += emit_nop (p); | |
2734 | ||
2735 | emit_ops_insns (buf, p - buf); | |
2736 | } | |
2737 | ||
2738 | /* Implementation of emit_ops method "emit_goto". */ | |
2739 | ||
2740 | static void | |
2741 | aarch64_emit_goto (int *offset_p, int *size_p) | |
2742 | { | |
2743 | uint32_t buf[16]; | |
2744 | uint32_t *p = buf; | |
2745 | ||
2746 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2747 | if (offset_p) | |
2748 | *offset_p = 0; | |
2749 | if (size_p) | |
2750 | *size_p = 4; | |
2751 | p += emit_nop (p); | |
2752 | ||
2753 | emit_ops_insns (buf, p - buf); | |
2754 | } | |
2755 | ||
2756 | /* Implementation of emit_ops method "write_goto_address". */ | |
2757 | ||
bb1183e2 | 2758 | static void |
afbe19f8 PL |
2759 | aarch64_write_goto_address (CORE_ADDR from, CORE_ADDR to, int size) |
2760 | { | |
2761 | uint32_t insn; | |
2762 | ||
2763 | emit_b (&insn, 0, to - from); | |
2764 | append_insns (&from, 1, &insn); | |
2765 | } | |
2766 | ||
2767 | /* Implementation of emit_ops method "emit_const". */ | |
2768 | ||
2769 | static void | |
2770 | aarch64_emit_const (LONGEST num) | |
2771 | { | |
2772 | uint32_t buf[16]; | |
2773 | uint32_t *p = buf; | |
2774 | ||
2775 | p += emit_mov_addr (p, x0, num); | |
2776 | ||
2777 | emit_ops_insns (buf, p - buf); | |
2778 | } | |
2779 | ||
2780 | /* Implementation of emit_ops method "emit_call". */ | |
2781 | ||
2782 | static void | |
2783 | aarch64_emit_call (CORE_ADDR fn) | |
2784 | { | |
2785 | uint32_t buf[16]; | |
2786 | uint32_t *p = buf; | |
2787 | ||
2788 | p += emit_mov_addr (p, ip0, fn); | |
2789 | p += emit_blr (p, ip0); | |
2790 | ||
2791 | emit_ops_insns (buf, p - buf); | |
2792 | } | |
2793 | ||
2794 | /* Implementation of emit_ops method "emit_reg". */ | |
2795 | ||
2796 | static void | |
2797 | aarch64_emit_reg (int reg) | |
2798 | { | |
2799 | uint32_t buf[16]; | |
2800 | uint32_t *p = buf; | |
2801 | ||
2802 | /* Set x0 to unsigned char *regs. */ | |
2803 | p += emit_sub (p, x0, fp, immediate_operand (2 * 8)); | |
2804 | p += emit_ldr (p, x0, x0, offset_memory_operand (0)); | |
2805 | p += emit_mov (p, x1, immediate_operand (reg)); | |
2806 | ||
2807 | emit_ops_insns (buf, p - buf); | |
2808 | ||
2809 | aarch64_emit_call (get_raw_reg_func_addr ()); | |
2810 | } | |
2811 | ||
2812 | /* Implementation of emit_ops method "emit_pop". */ | |
2813 | ||
2814 | static void | |
2815 | aarch64_emit_pop (void) | |
2816 | { | |
2817 | uint32_t buf[16]; | |
2818 | uint32_t *p = buf; | |
2819 | ||
2820 | p += emit_pop (p, x0); | |
2821 | ||
2822 | emit_ops_insns (buf, p - buf); | |
2823 | } | |
2824 | ||
2825 | /* Implementation of emit_ops method "emit_stack_flush". */ | |
2826 | ||
2827 | static void | |
2828 | aarch64_emit_stack_flush (void) | |
2829 | { | |
2830 | uint32_t buf[16]; | |
2831 | uint32_t *p = buf; | |
2832 | ||
2833 | p += emit_push (p, x0); | |
2834 | ||
2835 | emit_ops_insns (buf, p - buf); | |
2836 | } | |
2837 | ||
2838 | /* Implementation of emit_ops method "emit_zero_ext". */ | |
2839 | ||
2840 | static void | |
2841 | aarch64_emit_zero_ext (int arg) | |
2842 | { | |
2843 | uint32_t buf[16]; | |
2844 | uint32_t *p = buf; | |
2845 | ||
2846 | p += emit_ubfx (p, x0, x0, 0, arg); | |
2847 | ||
2848 | emit_ops_insns (buf, p - buf); | |
2849 | } | |
2850 | ||
2851 | /* Implementation of emit_ops method "emit_swap". */ | |
2852 | ||
2853 | static void | |
2854 | aarch64_emit_swap (void) | |
2855 | { | |
2856 | uint32_t buf[16]; | |
2857 | uint32_t *p = buf; | |
2858 | ||
2859 | p += emit_ldr (p, x1, sp, offset_memory_operand (0 * 16)); | |
2860 | p += emit_str (p, x0, sp, offset_memory_operand (0 * 16)); | |
2861 | p += emit_mov (p, x0, register_operand (x1)); | |
2862 | ||
2863 | emit_ops_insns (buf, p - buf); | |
2864 | } | |
2865 | ||
2866 | /* Implementation of emit_ops method "emit_stack_adjust". */ | |
2867 | ||
2868 | static void | |
2869 | aarch64_emit_stack_adjust (int n) | |
2870 | { | |
2871 | /* This is not needed with our design. */ | |
2872 | uint32_t buf[16]; | |
2873 | uint32_t *p = buf; | |
2874 | ||
2875 | p += emit_add (p, sp, sp, immediate_operand (n * 16)); | |
2876 | ||
2877 | emit_ops_insns (buf, p - buf); | |
2878 | } | |
2879 | ||
2880 | /* Implementation of emit_ops method "emit_int_call_1". */ | |
2881 | ||
2882 | static void | |
2883 | aarch64_emit_int_call_1 (CORE_ADDR fn, int arg1) | |
2884 | { | |
2885 | uint32_t buf[16]; | |
2886 | uint32_t *p = buf; | |
2887 | ||
2888 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2889 | ||
2890 | emit_ops_insns (buf, p - buf); | |
2891 | ||
2892 | aarch64_emit_call (fn); | |
2893 | } | |
2894 | ||
2895 | /* Implementation of emit_ops method "emit_void_call_2". */ | |
2896 | ||
2897 | static void | |
2898 | aarch64_emit_void_call_2 (CORE_ADDR fn, int arg1) | |
2899 | { | |
2900 | uint32_t buf[16]; | |
2901 | uint32_t *p = buf; | |
2902 | ||
2903 | /* Push x0 on the stack. */ | |
2904 | aarch64_emit_stack_flush (); | |
2905 | ||
2906 | /* Setup arguments for the function call: | |
2907 | ||
2908 | x0: arg1 | |
2909 | x1: top of the stack | |
2910 | ||
2911 | MOV x1, x0 | |
2912 | MOV x0, #arg1 */ | |
2913 | ||
2914 | p += emit_mov (p, x1, register_operand (x0)); | |
2915 | p += emit_mov (p, x0, immediate_operand (arg1)); | |
2916 | ||
2917 | emit_ops_insns (buf, p - buf); | |
2918 | ||
2919 | aarch64_emit_call (fn); | |
2920 | ||
2921 | /* Restore x0. */ | |
2922 | aarch64_emit_pop (); | |
2923 | } | |
2924 | ||
2925 | /* Implementation of emit_ops method "emit_eq_goto". */ | |
2926 | ||
2927 | static void | |
2928 | aarch64_emit_eq_goto (int *offset_p, int *size_p) | |
2929 | { | |
2930 | uint32_t buf[16]; | |
2931 | uint32_t *p = buf; | |
2932 | ||
2933 | p += emit_pop (p, x1); | |
2934 | p += emit_cmp (p, x1, register_operand (x0)); | |
2935 | /* Branch over the next instruction if x0 != x1. */ | |
2936 | p += emit_bcond (p, NE, 8); | |
2937 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2938 | if (offset_p) | |
2939 | *offset_p = (p - buf) * 4; | |
2940 | if (size_p) | |
2941 | *size_p = 4; | |
2942 | p += emit_nop (p); | |
2943 | ||
2944 | emit_ops_insns (buf, p - buf); | |
2945 | } | |
2946 | ||
2947 | /* Implementation of emit_ops method "emit_ne_goto". */ | |
2948 | ||
2949 | static void | |
2950 | aarch64_emit_ne_goto (int *offset_p, int *size_p) | |
2951 | { | |
2952 | uint32_t buf[16]; | |
2953 | uint32_t *p = buf; | |
2954 | ||
2955 | p += emit_pop (p, x1); | |
2956 | p += emit_cmp (p, x1, register_operand (x0)); | |
2957 | /* Branch over the next instruction if x0 == x1. */ | |
2958 | p += emit_bcond (p, EQ, 8); | |
2959 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2960 | if (offset_p) | |
2961 | *offset_p = (p - buf) * 4; | |
2962 | if (size_p) | |
2963 | *size_p = 4; | |
2964 | p += emit_nop (p); | |
2965 | ||
2966 | emit_ops_insns (buf, p - buf); | |
2967 | } | |
2968 | ||
2969 | /* Implementation of emit_ops method "emit_lt_goto". */ | |
2970 | ||
2971 | static void | |
2972 | aarch64_emit_lt_goto (int *offset_p, int *size_p) | |
2973 | { | |
2974 | uint32_t buf[16]; | |
2975 | uint32_t *p = buf; | |
2976 | ||
2977 | p += emit_pop (p, x1); | |
2978 | p += emit_cmp (p, x1, register_operand (x0)); | |
2979 | /* Branch over the next instruction if x0 >= x1. */ | |
2980 | p += emit_bcond (p, GE, 8); | |
2981 | /* The NOP instruction will be patched with an unconditional branch. */ | |
2982 | if (offset_p) | |
2983 | *offset_p = (p - buf) * 4; | |
2984 | if (size_p) | |
2985 | *size_p = 4; | |
2986 | p += emit_nop (p); | |
2987 | ||
2988 | emit_ops_insns (buf, p - buf); | |
2989 | } | |
2990 | ||
2991 | /* Implementation of emit_ops method "emit_le_goto". */ | |
2992 | ||
2993 | static void | |
2994 | aarch64_emit_le_goto (int *offset_p, int *size_p) | |
2995 | { | |
2996 | uint32_t buf[16]; | |
2997 | uint32_t *p = buf; | |
2998 | ||
2999 | p += emit_pop (p, x1); | |
3000 | p += emit_cmp (p, x1, register_operand (x0)); | |
3001 | /* Branch over the next instruction if x0 > x1. */ | |
3002 | p += emit_bcond (p, GT, 8); | |
3003 | /* The NOP instruction will be patched with an unconditional branch. */ | |
3004 | if (offset_p) | |
3005 | *offset_p = (p - buf) * 4; | |
3006 | if (size_p) | |
3007 | *size_p = 4; | |
3008 | p += emit_nop (p); | |
3009 | ||
3010 | emit_ops_insns (buf, p - buf); | |
3011 | } | |
3012 | ||
3013 | /* Implementation of emit_ops method "emit_gt_goto". */ | |
3014 | ||
3015 | static void | |
3016 | aarch64_emit_gt_goto (int *offset_p, int *size_p) | |
3017 | { | |
3018 | uint32_t buf[16]; | |
3019 | uint32_t *p = buf; | |
3020 | ||
3021 | p += emit_pop (p, x1); | |
3022 | p += emit_cmp (p, x1, register_operand (x0)); | |
3023 | /* Branch over the next instruction if x0 <= x1. */ | |
3024 | p += emit_bcond (p, LE, 8); | |
3025 | /* The NOP instruction will be patched with an unconditional branch. */ | |
3026 | if (offset_p) | |
3027 | *offset_p = (p - buf) * 4; | |
3028 | if (size_p) | |
3029 | *size_p = 4; | |
3030 | p += emit_nop (p); | |
3031 | ||
3032 | emit_ops_insns (buf, p - buf); | |
3033 | } | |
3034 | ||
3035 | /* Implementation of emit_ops method "emit_ge_got". */ | |
3036 | ||
3037 | static void | |
3038 | aarch64_emit_ge_got (int *offset_p, int *size_p) | |
3039 | { | |
3040 | uint32_t buf[16]; | |
3041 | uint32_t *p = buf; | |
3042 | ||
3043 | p += emit_pop (p, x1); | |
3044 | p += emit_cmp (p, x1, register_operand (x0)); | |
3045 | /* Branch over the next instruction if x0 <= x1. */ | |
3046 | p += emit_bcond (p, LT, 8); | |
3047 | /* The NOP instruction will be patched with an unconditional branch. */ | |
3048 | if (offset_p) | |
3049 | *offset_p = (p - buf) * 4; | |
3050 | if (size_p) | |
3051 | *size_p = 4; | |
3052 | p += emit_nop (p); | |
3053 | ||
3054 | emit_ops_insns (buf, p - buf); | |
3055 | } | |
3056 | ||
3057 | static struct emit_ops aarch64_emit_ops_impl = | |
3058 | { | |
3059 | aarch64_emit_prologue, | |
3060 | aarch64_emit_epilogue, | |
3061 | aarch64_emit_add, | |
3062 | aarch64_emit_sub, | |
3063 | aarch64_emit_mul, | |
3064 | aarch64_emit_lsh, | |
3065 | aarch64_emit_rsh_signed, | |
3066 | aarch64_emit_rsh_unsigned, | |
3067 | aarch64_emit_ext, | |
3068 | aarch64_emit_log_not, | |
3069 | aarch64_emit_bit_and, | |
3070 | aarch64_emit_bit_or, | |
3071 | aarch64_emit_bit_xor, | |
3072 | aarch64_emit_bit_not, | |
3073 | aarch64_emit_equal, | |
3074 | aarch64_emit_less_signed, | |
3075 | aarch64_emit_less_unsigned, | |
3076 | aarch64_emit_ref, | |
3077 | aarch64_emit_if_goto, | |
3078 | aarch64_emit_goto, | |
3079 | aarch64_write_goto_address, | |
3080 | aarch64_emit_const, | |
3081 | aarch64_emit_call, | |
3082 | aarch64_emit_reg, | |
3083 | aarch64_emit_pop, | |
3084 | aarch64_emit_stack_flush, | |
3085 | aarch64_emit_zero_ext, | |
3086 | aarch64_emit_swap, | |
3087 | aarch64_emit_stack_adjust, | |
3088 | aarch64_emit_int_call_1, | |
3089 | aarch64_emit_void_call_2, | |
3090 | aarch64_emit_eq_goto, | |
3091 | aarch64_emit_ne_goto, | |
3092 | aarch64_emit_lt_goto, | |
3093 | aarch64_emit_le_goto, | |
3094 | aarch64_emit_gt_goto, | |
3095 | aarch64_emit_ge_got, | |
3096 | }; | |
3097 | ||
ab64c999 | 3098 | /* Implementation of target ops method "emit_ops". */ |
afbe19f8 | 3099 | |
ab64c999 TBA |
3100 | emit_ops * |
3101 | aarch64_target::emit_ops () | |
afbe19f8 PL |
3102 | { |
3103 | return &aarch64_emit_ops_impl; | |
3104 | } | |
3105 | ||
809a0c35 | 3106 | /* Implementation of target ops method |
bb903df0 PL |
3107 | "get_min_fast_tracepoint_insn_len". */ |
3108 | ||
809a0c35 TBA |
3109 | int |
3110 | aarch64_target::get_min_fast_tracepoint_insn_len () | |
bb903df0 PL |
3111 | { |
3112 | return 4; | |
3113 | } | |
3114 | ||
9cfd8715 | 3115 | /* Implementation of linux target ops method "low_supports_range_stepping". */ |
d1d0aea1 | 3116 | |
9cfd8715 TBA |
3117 | bool |
3118 | aarch64_target::low_supports_range_stepping () | |
d1d0aea1 | 3119 | { |
9cfd8715 | 3120 | return true; |
d1d0aea1 PL |
3121 | } |
3122 | ||
3ca4edb6 | 3123 | /* Implementation of target ops method "sw_breakpoint_from_kind". */ |
dd373349 | 3124 | |
3ca4edb6 TBA |
3125 | const gdb_byte * |
3126 | aarch64_target::sw_breakpoint_from_kind (int kind, int *size) | |
dd373349 | 3127 | { |
17b1509a YQ |
3128 | if (is_64bit_tdesc ()) |
3129 | { | |
3130 | *size = aarch64_breakpoint_len; | |
3131 | return aarch64_breakpoint; | |
3132 | } | |
3133 | else | |
3134 | return arm_sw_breakpoint_from_kind (kind, size); | |
3135 | } | |
3136 | ||
06250e4e | 3137 | /* Implementation of target ops method "breakpoint_kind_from_pc". */ |
17b1509a | 3138 | |
06250e4e TBA |
3139 | int |
3140 | aarch64_target::breakpoint_kind_from_pc (CORE_ADDR *pcptr) | |
17b1509a YQ |
3141 | { |
3142 | if (is_64bit_tdesc ()) | |
3143 | return aarch64_breakpoint_len; | |
3144 | else | |
3145 | return arm_breakpoint_kind_from_pc (pcptr); | |
3146 | } | |
3147 | ||
06250e4e | 3148 | /* Implementation of the target ops method |
17b1509a YQ |
3149 | "breakpoint_kind_from_current_state". */ |
3150 | ||
06250e4e TBA |
3151 | int |
3152 | aarch64_target::breakpoint_kind_from_current_state (CORE_ADDR *pcptr) | |
17b1509a YQ |
3153 | { |
3154 | if (is_64bit_tdesc ()) | |
3155 | return aarch64_breakpoint_len; | |
3156 | else | |
3157 | return arm_breakpoint_kind_from_current_state (pcptr); | |
dd373349 AT |
3158 | } |
3159 | ||
176eb98c MS |
3160 | struct linux_target_ops the_low_target = |
3161 | { | |
061fc021 | 3162 | aarch64_get_syscall_trapinfo, |
176eb98c | 3163 | }; |
3aee8918 | 3164 | |
ef0478f6 TBA |
3165 | /* The linux target ops object. */ |
3166 | ||
3167 | linux_process_target *the_linux_target = &the_aarch64_target; | |
3168 | ||
3aee8918 PA |
3169 | void |
3170 | initialize_low_arch (void) | |
3171 | { | |
3b53ae99 YQ |
3172 | initialize_low_arch_aarch32 (); |
3173 | ||
3aee8918 | 3174 | initialize_regsets_info (&aarch64_regsets_info); |
02895270 | 3175 | initialize_regsets_info (&aarch64_sve_regsets_info); |
3aee8918 | 3176 | } |